Technical characteristics and methods of measurement for equipment for generation, transmission and reception of Digital Selective Calling (DSC) in the maritime MF, MF/HF and/or VHF mobile service - Part 2: Class A DSC

The present document states the minimum requirements for equipment to be used for generation, transmission and
reception of Class A Digital Selective Calling (DSC) for use on board ships.
DSC is intended to be used in the Medium Frequency (MF), High Frequency (HF) and Very High Frequency (VHF)
bands of the Maritime Mobile Service (MMS), for both distress, safety and general communications.
The present document is part 2 of a multi-part deliverable that covers the requirements to be fulfilled by equipment that
is either integrated with a transmitter and/or a receiver or equipment that is a stand-alone DSC terminal and has the
following class of DSC:
• Class A: includes all the facilities defined in annex 1 of Recommendation ITU-R M.493-15 [3] and complies
with the IMO Global Maritime Distress and Safety System (GMDSS) carriage requirements for MF/HF
installations and/or VHF installations.
These requirements include the relevant provisions of the ITU Radio Regulations [2] and Recommendation ITU-R
RM.493-15 [3], the International Convention for the Safety Of Life At Sea (SOLAS) [1], and the relevant resolutions of
the International Maritime Organization (IMO) [4].

Tehnične karakteristike in merilne metode za naprave, ki generirajo, oddajajo in sprejemajo digitalni selektivni klic (DSC) v pomorski mobilni storitvi, ki deluje v območju MF, MF/HF oziroma VHF - 2. del: Digitalni selektivni klic razreda A

General Information

Status
Published
Public Enquiry End Date
30-Dec-2019
Publication Date
18-Jun-2020
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
08-Jun-2020
Due Date
13-Aug-2020
Completion Date
19-Jun-2020

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ETSI EN 300 338-2 V1.5.1 (2020-06) - Technical characteristics and methods of measurement for equipment for generation, transmission and reception of Digital Selective Calling (DSC) in the maritime MF, MF/HF and/or VHF mobile service; Part 2: Class A DSC
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ETSI EN 300 338-2 V1.5.1 (2020-03) - Technical characteristics and methods of measurement for equipment for generation, transmission and reception of Digital Selective Calling (DSC) in the maritime MF, MF/HF and/or VHF mobile service; Part 2: Class A DSC
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ETSI EN 300 338-2 V1.5.0 (2019-10) - Technical characteristics and methods of measurement for equipment for generation, transmission and reception of Digital Selective Calling (DSC) in the maritime MF, MF/HF and/or VHF mobile service; Part 2: Class A DSC
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SLOVENSKI STANDARD
SIST EN 300 338-2 V1.5.1:2020
01-september-2020
Tehnične karakteristike in merilne metode za naprave, ki generirajo, oddajajo in

sprejemajo digitalni selektivni klic (DSC) v pomorski mobilni storitvi, ki deluje v

območju MF, MF/HF oziroma VHF - 2. del: Digitalni selektivni klic razreda A

Technical characteristics and methods of measurement for equipment for generation,

transmission and reception of Digital Selective Calling (DSC) in the maritime MF, MF/HF

and/or VHF mobile service - Part 2: Class A DSC
Ta slovenski standard je istoveten z: ETSI EN 300 338-2 V1.5.1 (2020-06)
ICS:
33.060.20 Sprejemna in oddajna Receiving and transmitting
oprema equipment
47.020.70 Navigacijska in krmilna Navigation and control
oprema equipment
SIST EN 300 338-2 V1.5.1:2020 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN 300 338-2 V1.5.1:2020
---------------------- Page: 2 ----------------------
SIST EN 300 338-2 V1.5.1:2020
ETSI EN 300 338-2 V1.5.1 (2020-06)
EUROPEAN STANDARD
Technical characteristics and methods of measurement
for equipment for generation, transmission
and reception of Digital Selective Calling (DSC)
in the maritime MF, MF/HF and/or VHF mobile service;
Part 2: Class A DSC
---------------------- Page: 3 ----------------------
SIST EN 300 338-2 V1.5.1:2020
2 ETSI EN 300 338-2 V1.5.1 (2020-06)
Reference
REN/ERM-TGMAR-593
Keywords
DSC, GMDSS, maritime, radio
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE
Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16
Siret N° 348 623 562 00017 - NAF 742 C
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° 7803/88
Important notice
The present document can be downloaded from:
http://www.etsi.org/standards-search

The present document may be made available in electronic versions and/or in print. The content of any electronic and/or

print versions of the present document shall not be modified without the prior written authorization of ETSI. In case of any

existing or perceived difference in contents between such versions and/or in print, the prevailing version of an ETSI

deliverable is the one made publicly available in PDF format at www.etsi.org/deliver.

Users of the present document should be aware that the document may be subject to revision or change of status.

Information on the current status of this and other ETSI documents is available at

https://portal.etsi.org/TB/ETSIDeliverableStatus.aspx

If you find errors in the present document, please send your comment to one of the following services:

https://portal.etsi.org/People/CommiteeSupportStaff.aspx
Copyright Notification

No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying

and microfilm except as authorized by written permission of ETSI.

The content of the PDF version shall not be modified without the written authorization of ETSI.

The copyright and the foregoing restriction extend to reproduction in all media.
© ETSI 2020.
All rights reserved.

DECT™, PLUGTESTS™, UMTS™ and the ETSI logo are trademarks of ETSI registered for the benefit of its Members.

3GPP™ and LTE™ are trademarks of ETSI registered for the benefit of its Members and

of the 3GPP Organizational Partners.

oneM2M™ logo is a trademark of ETSI registered for the benefit of its Members and

of the oneM2M Partners.
GSM and the GSM logo are trademarks registered and owned by the GSM Association.
ETSI
---------------------- Page: 4 ----------------------
SIST EN 300 338-2 V1.5.1:2020
3 ETSI EN 300 338-2 V1.5.1 (2020-06)
Contents

Intellectual Property Rights ................................................................................................................................ 6

Foreword ............................................................................................................................................................. 6

Modal verbs terminology .................................................................................................................................... 6

1 Scope ........................................................................................................................................................ 7

2 References ................................................................................................................................................ 7

2.1 Normative references ......................................................................................................................................... 7

2.2 Informative references ........................................................................................................................................ 7

3 Definition of terms, symbols and abbreviations ....................................................................................... 8

3.1 Terms .................................................................................................................................................................. 8

3.2 Symbols ............................................................................................................................................................ 10

3.3 Abbreviations ................................................................................................................................................... 10

4 Controls and Indicators in Class A DSC Equipment .............................................................................. 10

4.1 Visual indication .............................................................................................................................................. 10

5 Technical requirements .......................................................................................................................... 11

5.1 Facilities for DSC transmission and reception ................................................................................................. 11

5.1.1 Multi-frequency distress alert attempts and watch receiver capabilities (MF/HF) ..................................... 11

5.1.2 Watch receiver capabilities (VHF) ............................................................................................................. 11

5.2 Remote alarms .................................................................................................................................................. 11

5.3 Galvanic isolation ............................................................................................................................................. 11

5.4 Manuals ............................................................................................................................................................ 11

6 Automated and Non-Automated Procedure Requirements in Class A DSC Equipment ....................... 11

6.1 Introduction ...................................................................................................................................................... 11

6.2 Non-automated features ................................................................................................................................... 12

6.2.0 General ........................................................................................................................................................ 12

6.2.1 DSC Message Composition ........................................................................................................................ 12

6.2.2 Transmission of DSC messages and prioritized wait .................................................................................. 13

6.2.3 Alarms ........................................................................................................................................................ 14

6.3 Standby ............................................................................................................................................................. 14

6.4 Sending distress automated procedure ............................................................................................................. 15

6.4.1 Procedure .................................................................................................................................................... 15

6.4.2 Tasks ........................................................................................................................................................... 17

6.4.3 Display ........................................................................................................................................................ 17

6.4.3.0 General Display Requirements .............................................................................................................. 17

6.4.3.1 Examples of sending distress procedure displays on VHF equipment .................................................. 18

6.4.4 Dedicated distress button sub procedure ..................................................................................................... 19

6.4.5 Transmission of the alert attempt ................................................................................................................ 20

6.4.6 Updating position ........................................................................................................................................ 20

6.4.7 Handling received DSC Messages .............................................................................................................. 20

6.4.8 Alarms ........................................................................................................................................................ 20

6.4.9 Determining Subsequent communications .................................................................................................. 21

6.4.10 Automated tuning ....................................................................................................................................... 21

6.4.11 Cancelling the Distress Alert ...................................................................................................................... 21

6.4.11.0 General Requirements ........................................................................................................................... 21

6.4.11.1 Examples of cancel-distress displays on VHF equipment..................................................................... 22

6.4.12 Acknowledgments ...................................................................................................................................... 23

6.4.13 Termination................................................................................................................................................. 23

6.4.14 Warnings ..................................................................................................................................................... 23

6.5 Receiving distress automated procedure .......................................................................................................... 23

6.5.1 Procedure .................................................................................................................................................... 23

6.5.2 Tasks ........................................................................................................................................................... 25

6.5.3 Display ........................................................................................................................................................ 25

6.5.3.0 General Display Requirements .............................................................................................................. 25

6.5.3.1 Examples of received distress procedure displays on VHF equipment ................................................. 26

ETSI
---------------------- Page: 5 ----------------------
SIST EN 300 338-2 V1.5.1:2020
4 ETSI EN 300 338-2 V1.5.1 (2020-06)

6.5.4 Handling received DSC Messages .............................................................................................................. 27

6.5.5 Alarms ........................................................................................................................................................ 27

6.5.6 Determining Subsequent communications .................................................................................................. 27

6.5.7 Automated tuning ....................................................................................................................................... 27

6.5.8 Acknowledgments ...................................................................................................................................... 28

6.5.9 Sending Relays and Acknowledgments ...................................................................................................... 28

6.5.10 Termination................................................................................................................................................. 28

6.5.11 Warnings ..................................................................................................................................................... 28

6.5.12 Handling events from man overboard devices (VHF only) ........................................................................ 29

6.5.12.1 General .................................................................................................................................................. 29

6.5.12.2 Display and tasks .................................................................................................................................. 29

6.5.12.3 Handling received DSC messages pertinent to the procedure ............................................................... 30

6.6 Sending non-distress automated procedure ...................................................................................................... 30

6.6.1 Procedure .................................................................................................................................................... 30

6.6.2 Tasks ........................................................................................................................................................... 31

6.6.3 Display ........................................................................................................................................................ 32

6.6.3.0 General Display Requirements .............................................................................................................. 32

6.6.3.1 Examples of sending non-distress procedures displays on VHF equipment ......................................... 33

6.6.4 Handling received DSC Messages .............................................................................................................. 33

6.6.5 Alarms ........................................................................................................................................................ 33

6.6.6 Automated tuning ....................................................................................................................................... 33

6.6.7 Delayed Acknowledgements ...................................................................................................................... 34

6.6.8 Termination................................................................................................................................................. 34

6.6.9 Warnings ..................................................................................................................................................... 34

6.7 Receiving non-distress automated procedure ................................................................................................... 34

6.7.1 Procedure .................................................................................................................................................... 34

6.7.2 Tasks ........................................................................................................................................................... 36

6.7.3 Display ........................................................................................................................................................ 36

6.7.3.0 General Display Requirements .............................................................................................................. 36

6.7.3.1 Examples of receiving non-distress procedures displays on VHF equipment ....................................... 37

6.7.4 Handling received DSC messages .............................................................................................................. 38

6.7.5 Alarms ........................................................................................................................................................ 38

6.7.6 Automated tuning ....................................................................................................................................... 38

6.7.7 Acknowledgments ...................................................................................................................................... 38

6.7.8 Termination................................................................................................................................................. 39

6.7.9 Warnings ..................................................................................................................................................... 39

6.8 Communications automated procedure ............................................................................................................ 39

6.8.1 Procedure .................................................................................................................................................... 39

6.8.2 Tasks ........................................................................................................................................................... 39

6.8.3 Display ........................................................................................................................................................ 40

6.8.4 Handling received DSC Messages .............................................................................................................. 40

6.8.5 Tuning of the general receiver and transmitter ........................................................................................... 40

6.8.6 Termination................................................................................................................................................. 40

6.9 Multiple automated procedures and parallel event handling ............................................................................ 40

6.9.1 Procedure .................................................................................................................................................... 40

6.9.2 Tasks ........................................................................................................................................................... 40

6.9.3 Examples of multiple procedure screens .................................................................................................... 41

Annex A (normative): DSC Message Composition ........................................................................... 43

A.1 Default values ......................................................................................................................................... 43

A.2 The default DROBOSE .......................................................................................................................... 44

A.3 Allowable non-distress DSC message parameters ................................................................................. 44

Annex B (normative): Radius-Centre point conversion and rounding algorithm ......................... 45

B.1 Radius-centre point conversion .............................................................................................................. 45

B.2 Rounding ................................................................................................................................................ 46

B.3 Special cases for either form of area data entry ..................................................................................... 46

ETSI
---------------------- Page: 6 ----------------------
SIST EN 300 338-2 V1.5.1:2020
5 ETSI EN 300 338-2 V1.5.1 (2020-06)

Annex C (normative): Automated Non-Distress Channel/Frequency Selection Algorithm .......... 47

C.0 General ................................................................................................................................................... 47

C.1 VHF ........................................................................................................................................................ 47

C.2 HF ........................................................................................................................................................... 47

Annex D (normative): Alarms ............................................................................................................. 48

D.1 Alarm specifications ............................................................................................................................... 48

D.2 Alarming with critical errors .................................................................................................................. 49

D.3 Default alarm sounds .............................................................................................................................. 49

D.4 Other alarm sounds ................................................................................................................................. 50

History .............................................................................................................................................................. 51

ETSI
---------------------- Page: 7 ----------------------
SIST EN 300 338-2 V1.5.1:2020
6 ETSI EN 300 338-2 V1.5.1 (2020-06)
Intellectual Property Rights
Essential patents

IPRs essential or potentially essential to normative deliverables may have been declared to ETSI. The information

pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found

in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in

respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web

server (https://ipr.etsi.org/).

Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee

can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web

server) which are, or may be, or may become, essential to the present document.
Trademarks

The present document may include trademarks and/or tradenames which are asserted and/or registered by their owners.

ETSI claims no ownership of these except for any which are indicated as being the property of ETSI, and conveys no

right to use or reproduce any trademark and/or tradename. Mention of those trademarks in the present document does

not constitute an endorsement by ETSI of products, services or organizations associated with those trademarks.

Foreword

This European Standard (EN) has been produced by ETSI Technical Committee Electromagnetic compatibility and

Radio spectrum Matters (ERM).

The present document is part 2 of a multi-part deliverable. Full details of the entire series can be found in part 1 [i.1].

The present document covers the operator interfaces and operating system for Class A DSC equipment.

National transposition dates
Date of adoption of this EN: 29 May 2020
Date of latest announcement of this EN (doa): 31 August 2020
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 28 February 2021
Date of withdrawal of any conflicting National Standard (dow): 28 February 2022
Modal verbs terminology

In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and

"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of

provisions).

"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.

ETSI
---------------------- Page: 8 ----------------------
SIST EN 300 338-2 V1.5.1:2020
7 ETSI EN 300 338-2 V1.5.1 (2020-06)
1 Scope

The present document states the minimum requirements for equipment to be used for generation, transmission and

reception of Class A Digital Selective Calling (DSC) for use on board ships.

DSC is intended to be used in the Medium Frequency (MF), High Frequency (HF) and Very High Frequency (VHF)

bands of the Maritime Mobile Service (MMS), for both distress, safety and general communications.

The present document is part 2 of a multi-part deliverable that covers the requirements to be fulfilled by equipment that

is either integrated with a transmitter and/or a receiver or equipment that is a stand-alone DSC terminal and has the

following class of DSC:

• Class A: includes all the facilities defined in annex 1 of Recommendation ITU-R M.493-15 [3] and complies

with the IMO Global Maritime Distress and Safety System (GMDSS) carriage requirements for MF/HF

installations and/or VHF installations.

These requirements include the relevant provisions of the ITU Radio Regulations [2] and Recommendation ITU-R

RM.493-15 [3], the International Convention for the Safety Of Life At Sea (SOLAS) [1], and the relevant resolutions of

the International Maritime Organization (IMO) [4].
2 References
2.1 Normative references

References are either specific (identified by date of publication and/or edition number or version number) or

non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the

referenced document (including any amendments) applies.

Referenced documents which are not found to be publicly available in the expected location might be found at

https://docbox.etsi.org/Reference/.

NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee

their long term validity.

The following referenced documents are necessary for the application of the present document.

[1] International Convention for the Safety of Life at Sea (SOLAS), 1974.
[2] ITU Radio Regulations (2016).

[3] Recommendation ITU-R M.493-15 (01/2019): "Digital selective-calling system for use in the

maritime mobile service".

[4] IMO resolution MSC.97(73), section 14.6.4: "Adoption of the International Code of Safety for

High-Speed Craft, 2000 (2000 HSC Code)".
2.2 Informative references

References are either specific (identified by date of publication and/or edition number or version number) or

non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the

referenced document (including any amendments) applies.

NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee

their long term validity.

The following referenced documents are not necessary for the application of the present document but they assist the

user with regard to a particular subject area.
ETSI
---------------------- Page: 9 ----------------------
SIST EN 300 338-2 V1.5.1:2020
8 ETSI EN 300 338-2 V1.5.1 (2020-06)

[i.1] ETSI EN 300 338-1: "Technical characteristics and methods of measurement for equipment for

generation, transmission and reception of Digital Selective Calling (DSC) in the maritime MF,

MF/HF and/or VHF mobile service; Part 1: Common requirements".

[i.2] MSC 302(87): "Adoption of performance standards for bridge alert management".

[i.3] IEC 61924-2 (Edition 1): "Maritime navigation and radiocommunication equipment and systems --

integrated navigation systems -- Part 2: Modular structure for INS -- operational and performance

requirements, methods of testing and required test results" (including IEC 61924-2 Corrigendum 1

November 2013).

[i.4] ETSI EN 300 338-6: "Technical characteristics and methods of measurement for equipment for

generation, transmission and reception of Digital Selective Calling (DSC) in the maritime MF,

MF/HF and/or VHF mobile service; Part 6: Class M DSC".

[i.5] Recommendation ITU-R M.541-10: "Operational procedures for the use of digital selective-calling

equipment in the maritime mobile service".

[i.6] Recommendation ITU-R M.585-8: "Assignment and use of identities in the maritime mobile

service".
3 Definition of terms, symbols and abbreviations
3.1 Terms

For the purposes of the present document, the terms given in ETSI EN 300 338-1 [i.1] and the following apply:

acknowledged: when the objective of the initial DSC message has been achieved

active: automated procedure which has control of the general receiver and transmitter and is thus able to engage in

subsequent communications and receive DSC messages on both the watch receiver and general receiver

...

ETSI EN 300 338-2 V1.5.1 (2020-06)
EUROPEAN STANDARD
Technical characteristics and methods of measurement
for equipment for generation, transmission
and reception of Digital Selective Calling (DSC)
in the maritime MF, MF/HF and/or VHF mobile service;
Part 2: Class A DSC
---------------------- Page: 1 ----------------------
2 ETSI EN 300 338-2 V1.5.1 (2020-06)
Reference
REN/ERM-TGMAR-593
Keywords
DSC, GMDSS, maritime, radio
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE
Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16
Siret N° 348 623 562 00017 - NAF 742 C
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° 7803/88
Important notice
The present document can be downloaded from:
http://www.etsi.org/standards-search

The present document may be made available in electronic versions and/or in print. The content of any electronic and/or

print versions of the present document shall not be modified without the prior written authorization of ETSI. In case of any

existing or perceived difference in contents between such versions and/or in print, the prevailing version of an ETSI

deliverable is the one made publicly available in PDF format at www.etsi.org/deliver.

Users of the present document should be aware that the document may be subject to revision or change of status.

Information on the current status of this and other ETSI documents is available at

https://portal.etsi.org/TB/ETSIDeliverableStatus.aspx

If you find errors in the present document, please send your comment to one of the following services:

https://portal.etsi.org/People/CommiteeSupportStaff.aspx
Copyright Notification

No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying

and microfilm except as authorized by written permission of ETSI.

The content of the PDF version shall not be modified without the written authorization of ETSI.

The copyright and the foregoing restriction extend to reproduction in all media.
© ETSI 2020.
All rights reserved.

DECT™, PLUGTESTS™, UMTS™ and the ETSI logo are trademarks of ETSI registered for the benefit of its Members.

3GPP™ and LTE™ are trademarks of ETSI registered for the benefit of its Members and

of the 3GPP Organizational Partners.

oneM2M™ logo is a trademark of ETSI registered for the benefit of its Members and

of the oneM2M Partners.
GSM and the GSM logo are trademarks registered and owned by the GSM Association.
ETSI
---------------------- Page: 2 ----------------------
3 ETSI EN 300 338-2 V1.5.1 (2020-06)
Contents

Intellectual Property Rights ................................................................................................................................ 6

Foreword ............................................................................................................................................................. 6

Modal verbs terminology .................................................................................................................................... 6

1 Scope ........................................................................................................................................................ 7

2 References ................................................................................................................................................ 7

2.1 Normative references ......................................................................................................................................... 7

2.2 Informative references ........................................................................................................................................ 7

3 Definition of terms, symbols and abbreviations ....................................................................................... 8

3.1 Terms .................................................................................................................................................................. 8

3.2 Symbols ............................................................................................................................................................ 10

3.3 Abbreviations ................................................................................................................................................... 10

4 Controls and Indicators in Class A DSC Equipment .............................................................................. 10

4.1 Visual indication .............................................................................................................................................. 10

5 Technical requirements .......................................................................................................................... 11

5.1 Facilities for DSC transmission and reception ................................................................................................. 11

5.1.1 Multi-frequency distress alert attempts and watch receiver capabilities (MF/HF) ..................................... 11

5.1.2 Watch receiver capabilities (VHF) ............................................................................................................. 11

5.2 Remote alarms .................................................................................................................................................. 11

5.3 Galvanic isolation ............................................................................................................................................. 11

5.4 Manuals ............................................................................................................................................................ 11

6 Automated and Non-Automated Procedure Requirements in Class A DSC Equipment ....................... 11

6.1 Introduction ...................................................................................................................................................... 11

6.2 Non-automated features ................................................................................................................................... 12

6.2.0 General ........................................................................................................................................................ 12

6.2.1 DSC Message Composition ........................................................................................................................ 12

6.2.2 Transmission of DSC messages and prioritized wait .................................................................................. 13

6.2.3 Alarms ........................................................................................................................................................ 14

6.3 Standby ............................................................................................................................................................. 14

6.4 Sending distress automated procedure ............................................................................................................. 15

6.4.1 Procedure .................................................................................................................................................... 15

6.4.2 Tasks ........................................................................................................................................................... 17

6.4.3 Display ........................................................................................................................................................ 17

6.4.3.0 General Display Requirements .............................................................................................................. 17

6.4.3.1 Examples of sending distress procedure displays on VHF equipment .................................................. 18

6.4.4 Dedicated distress button sub procedure ..................................................................................................... 19

6.4.5 Transmission of the alert attempt ................................................................................................................ 20

6.4.6 Updating position ........................................................................................................................................ 20

6.4.7 Handling received DSC Messages .............................................................................................................. 20

6.4.8 Alarms ........................................................................................................................................................ 20

6.4.9 Determining Subsequent communications .................................................................................................. 21

6.4.10 Automated tuning ....................................................................................................................................... 21

6.4.11 Cancelling the Distress Alert ...................................................................................................................... 21

6.4.11.0 General Requirements ........................................................................................................................... 21

6.4.11.1 Examples of cancel-distress displays on VHF equipment..................................................................... 22

6.4.12 Acknowledgments ...................................................................................................................................... 23

6.4.13 Termination................................................................................................................................................. 23

6.4.14 Warnings ..................................................................................................................................................... 23

6.5 Receiving distress automated procedure .......................................................................................................... 23

6.5.1 Procedure .................................................................................................................................................... 23

6.5.2 Tasks ........................................................................................................................................................... 25

6.5.3 Display ........................................................................................................................................................ 25

6.5.3.0 General Display Requirements .............................................................................................................. 25

6.5.3.1 Examples of received distress procedure displays on VHF equipment ................................................. 26

ETSI
---------------------- Page: 3 ----------------------
4 ETSI EN 300 338-2 V1.5.1 (2020-06)

6.5.4 Handling received DSC Messages .............................................................................................................. 27

6.5.5 Alarms ........................................................................................................................................................ 27

6.5.6 Determining Subsequent communications .................................................................................................. 27

6.5.7 Automated tuning ....................................................................................................................................... 27

6.5.8 Acknowledgments ...................................................................................................................................... 28

6.5.9 Sending Relays and Acknowledgments ...................................................................................................... 28

6.5.10 Termination................................................................................................................................................. 28

6.5.11 Warnings ..................................................................................................................................................... 28

6.5.12 Handling events from man overboard devices (VHF only) ........................................................................ 29

6.5.12.1 General .................................................................................................................................................. 29

6.5.12.2 Display and tasks .................................................................................................................................. 29

6.5.12.3 Handling received DSC messages pertinent to the procedure ............................................................... 30

6.6 Sending non-distress automated procedure ...................................................................................................... 30

6.6.1 Procedure .................................................................................................................................................... 30

6.6.2 Tasks ........................................................................................................................................................... 31

6.6.3 Display ........................................................................................................................................................ 32

6.6.3.0 General Display Requirements .............................................................................................................. 32

6.6.3.1 Examples of sending non-distress procedures displays on VHF equipment ......................................... 33

6.6.4 Handling received DSC Messages .............................................................................................................. 33

6.6.5 Alarms ........................................................................................................................................................ 33

6.6.6 Automated tuning ....................................................................................................................................... 33

6.6.7 Delayed Acknowledgements ...................................................................................................................... 34

6.6.8 Termination................................................................................................................................................. 34

6.6.9 Warnings ..................................................................................................................................................... 34

6.7 Receiving non-distress automated procedure ................................................................................................... 34

6.7.1 Procedure .................................................................................................................................................... 34

6.7.2 Tasks ........................................................................................................................................................... 36

6.7.3 Display ........................................................................................................................................................ 36

6.7.3.0 General Display Requirements .............................................................................................................. 36

6.7.3.1 Examples of receiving non-distress procedures displays on VHF equipment ....................................... 37

6.7.4 Handling received DSC messages .............................................................................................................. 38

6.7.5 Alarms ........................................................................................................................................................ 38

6.7.6 Automated tuning ....................................................................................................................................... 38

6.7.7 Acknowledgments ...................................................................................................................................... 38

6.7.8 Termination................................................................................................................................................. 39

6.7.9 Warnings ..................................................................................................................................................... 39

6.8 Communications automated procedure ............................................................................................................ 39

6.8.1 Procedure .................................................................................................................................................... 39

6.8.2 Tasks ........................................................................................................................................................... 39

6.8.3 Display ........................................................................................................................................................ 40

6.8.4 Handling received DSC Messages .............................................................................................................. 40

6.8.5 Tuning of the general receiver and transmitter ........................................................................................... 40

6.8.6 Termination................................................................................................................................................. 40

6.9 Multiple automated procedures and parallel event handling ............................................................................ 40

6.9.1 Procedure .................................................................................................................................................... 40

6.9.2 Tasks ........................................................................................................................................................... 40

6.9.3 Examples of multiple procedure screens .................................................................................................... 41

Annex A (normative): DSC Message Composition ........................................................................... 43

A.1 Default values ......................................................................................................................................... 43

A.2 The default DROBOSE .......................................................................................................................... 44

A.3 Allowable non-distress DSC message parameters ................................................................................. 44

Annex B (normative): Radius-Centre point conversion and rounding algorithm ......................... 45

B.1 Radius-centre point conversion .............................................................................................................. 45

B.2 Rounding ................................................................................................................................................ 46

B.3 Special cases for either form of area data entry ..................................................................................... 46

ETSI
---------------------- Page: 4 ----------------------
5 ETSI EN 300 338-2 V1.5.1 (2020-06)

Annex C (normative): Automated Non-Distress Channel/Frequency Selection Algorithm .......... 47

C.0 General ................................................................................................................................................... 47

C.1 VHF ........................................................................................................................................................ 47

C.2 HF ........................................................................................................................................................... 47

Annex D (normative): Alarms ............................................................................................................. 48

D.1 Alarm specifications ............................................................................................................................... 48

D.2 Alarming with critical errors .................................................................................................................. 49

D.3 Default alarm sounds .............................................................................................................................. 49

D.4 Other alarm sounds ................................................................................................................................. 50

History .............................................................................................................................................................. 51

ETSI
---------------------- Page: 5 ----------------------
6 ETSI EN 300 338-2 V1.5.1 (2020-06)
Intellectual Property Rights
Essential patents

IPRs essential or potentially essential to normative deliverables may have been declared to ETSI. The information

pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found

in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in

respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web

server (https://ipr.etsi.org/).

Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee

can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web

server) which are, or may be, or may become, essential to the present document.
Trademarks

The present document may include trademarks and/or tradenames which are asserted and/or registered by their owners.

ETSI claims no ownership of these except for any which are indicated as being the property of ETSI, and conveys no

right to use or reproduce any trademark and/or tradename. Mention of those trademarks in the present document does

not constitute an endorsement by ETSI of products, services or organizations associated with those trademarks.

Foreword

This European Standard (EN) has been produced by ETSI Technical Committee Electromagnetic compatibility and

Radio spectrum Matters (ERM).

The present document is part 2 of a multi-part deliverable. Full details of the entire series can be found in part 1 [i.1].

The present document covers the operator interfaces and operating system for Class A DSC equipment.

National transposition dates
Date of adoption of this EN: 29 May 2020
Date of latest announcement of this EN (doa): 31 August 2020
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 28 February 2021
Date of withdrawal of any conflicting National Standard (dow): 28 February 2022
Modal verbs terminology

In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and

"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of

provisions).

"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.

ETSI
---------------------- Page: 6 ----------------------
7 ETSI EN 300 338-2 V1.5.1 (2020-06)
1 Scope

The present document states the minimum requirements for equipment to be used for generation, transmission and

reception of Class A Digital Selective Calling (DSC) for use on board ships.

DSC is intended to be used in the Medium Frequency (MF), High Frequency (HF) and Very High Frequency (VHF)

bands of the Maritime Mobile Service (MMS), for both distress, safety and general communications.

The present document is part 2 of a multi-part deliverable that covers the requirements to be fulfilled by equipment that

is either integrated with a transmitter and/or a receiver or equipment that is a stand-alone DSC terminal and has the

following class of DSC:

• Class A: includes all the facilities defined in annex 1 of Recommendation ITU-R M.493-15 [3] and complies

with the IMO Global Maritime Distress and Safety System (GMDSS) carriage requirements for MF/HF

installations and/or VHF installations.

These requirements include the relevant provisions of the ITU Radio Regulations [2] and Recommendation ITU-R

RM.493-15 [3], the International Convention for the Safety Of Life At Sea (SOLAS) [1], and the relevant resolutions of

the International Maritime Organization (IMO) [4].
2 References
2.1 Normative references

References are either specific (identified by date of publication and/or edition number or version number) or

non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the

referenced document (including any amendments) applies.

Referenced documents which are not found to be publicly available in the expected location might be found at

https://docbox.etsi.org/Reference/.

NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee

their long term validity.

The following referenced documents are necessary for the application of the present document.

[1] International Convention for the Safety of Life at Sea (SOLAS), 1974.
[2] ITU Radio Regulations (2016).

[3] Recommendation ITU-R M.493-15 (01/2019): "Digital selective-calling system for use in the

maritime mobile service".

[4] IMO resolution MSC.97(73), section 14.6.4: "Adoption of the International Code of Safety for

High-Speed Craft, 2000 (2000 HSC Code)".
2.2 Informative references

References are either specific (identified by date of publication and/or edition number or version number) or

non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the

referenced document (including any amendments) applies.

NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee

their long term validity.

The following referenced documents are not necessary for the application of the present document but they assist the

user with regard to a particular subject area.
ETSI
---------------------- Page: 7 ----------------------
8 ETSI EN 300 338-2 V1.5.1 (2020-06)

[i.1] ETSI EN 300 338-1: "Technical characteristics and methods of measurement for equipment for

generation, transmission and reception of Digital Selective Calling (DSC) in the maritime MF,

MF/HF and/or VHF mobile service; Part 1: Common requirements".

[i.2] MSC 302(87): "Adoption of performance standards for bridge alert management".

[i.3] IEC 61924-2 (Edition 1): "Maritime navigation and radiocommunication equipment and systems --

integrated navigation systems -- Part 2: Modular structure for INS -- operational and performance

requirements, methods of testing and required test results" (including IEC 61924-2 Corrigendum 1

November 2013).

[i.4] ETSI EN 300 338-6: "Technical characteristics and methods of measurement for equipment for

generation, transmission and reception of Digital Selective Calling (DSC) in the maritime MF,

MF/HF and/or VHF mobile service; Part 6: Class M DSC".

[i.5] Recommendation ITU-R M.541-10: "Operational procedures for the use of digital selective-calling

equipment in the maritime mobile service".

[i.6] Recommendation ITU-R M.585-8: "Assignment and use of identities in the maritime mobile

service".
3 Definition of terms, symbols and abbreviations
3.1 Terms

For the purposes of the present document, the terms given in ETSI EN 300 338-1 [i.1] and the following apply:

acknowledged: when the objective of the initial DSC message has been achieved

active: automated procedure which has control of the general receiver and transmitter and is thus able to engage in

subsequent communications and receive DSC messages on both the watch receiver and general receiver

automated procedure: set of actions necessary to complete the objective of an initiating DSC message or non DSC

communication event

NOTE 1: Four DSC automated procedures are designed to process these. They are the receiving of distress DSC

messages, the receiving of non-distress DSC messages, the sending of distress DSC alert attempts and the

sending of non-distress DSC messages. In addition a fifth procedure is designed to handle non DSC

communication events.
NOTE 2: These automated procedures are called:
 Received distress automated procedure.
 Sending distress automated procedure.
 Received non-distress automated procedure.
 Sending non-distress automated procedure.
 Communications automated procedure.

closed loop operation: MOB devices supporting closed loop can be programmed to transmit either an individual

distress relay call (subsequent communication 126) to a vessel or group distress relay call to a group of vessels as

described in Recommendation ITU-R M.493-15 [3]
NOTE: Acknowledgement of these calls is possible.

default: value selected or an action taken by the equipment software in the absence of any operator input

distress DSC message: DSC message or acknowledgement containing the distress information

ETSI
---------------------- Page: 8 ------------
...

Final draft ETSI EN 300 338-2 V1.5.1 (2020-03)
EUROPEAN STANDARD
Technical characteristics and methods of measurement
for equipment for generation, transmission
and reception of Digital Selective Calling (DSC)
in the maritime MF, MF/HF and/or VHF mobile service;
Part 2: Class A DSC
---------------------- Page: 1 ----------------------
2 Final draft ETSI EN 300 338-2 V1.5.1 (2020-03)
Reference
REN/ERM-TGMAR-593
Keywords
DSC, GMDSS, maritime, radio
ETSI
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Sous-Préfecture de Grasse (06) N° 7803/88
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No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying

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The copyright and the foregoing restriction extend to reproduction in all media.
© ETSI 2020.
All rights reserved.

DECT™, PLUGTESTS™, UMTS™ and the ETSI logo are trademarks of ETSI registered for the benefit of its Members.

3GPP™ and LTE™ are trademarks of ETSI registered for the benefit of its Members and

of the 3GPP Organizational Partners.

oneM2M™ logo is a trademark of ETSI registered for the benefit of its Members and

of the oneM2M Partners.
GSM and the GSM logo are trademarks registered and owned by the GSM Association.
ETSI
---------------------- Page: 2 ----------------------
3 Final draft ETSI EN 300 338-2 V1.5.1 (2020-03)
Contents

Intellectual Property Rights ................................................................................................................................ 6

Foreword ............................................................................................................................................................. 6

Modal verbs terminology .................................................................................................................................... 6

1 Scope ........................................................................................................................................................ 7

2 References ................................................................................................................................................ 7

2.1 Normative references ......................................................................................................................................... 7

2.2 Informative references ........................................................................................................................................ 7

3 Definition of terms, symbols and abbreviations ....................................................................................... 8

3.1 Terms .................................................................................................................................................................. 8

3.2 Symbols ............................................................................................................................................................ 10

3.3 Abbreviations ................................................................................................................................................... 10

4 Controls and Indicators in Class A DSC Equipment .............................................................................. 10

4.1 Visual indication .............................................................................................................................................. 10

5 Technical requirements .......................................................................................................................... 11

5.1 Facilities for DSC transmission and reception ................................................................................................. 11

5.1.1 Multi-frequency distress alert attempts and watch receiver capabilities (MF/HF) ..................................... 11

5.1.2 Watch receiver capabilities (VHF) ............................................................................................................. 11

5.2 Remote alarms .................................................................................................................................................. 11

5.3 Galvanic isolation ............................................................................................................................................. 11

5.4 Manuals ............................................................................................................................................................ 11

6 Automated and Non-Automated Procedure Requirements in Class A DSC Equipment ....................... 11

6.1 Introduction ...................................................................................................................................................... 11

6.2 Non-automated features ................................................................................................................................... 12

6.2.0 General ........................................................................................................................................................ 12

6.2.1 DSC Message Composition ........................................................................................................................ 12

6.2.2 Transmission of DSC messages and prioritized wait .................................................................................. 13

6.2.3 Alarms ........................................................................................................................................................ 14

6.3 Standby ............................................................................................................................................................. 14

6.4 Sending distress automated procedure ............................................................................................................. 15

6.4.1 Procedure .................................................................................................................................................... 15

6.4.2 Tasks ........................................................................................................................................................... 17

6.4.3 Display ........................................................................................................................................................ 17

6.4.3.0 General Display Requirements .............................................................................................................. 17

6.4.3.1 Examples of sending distress procedure displays on VHF equipment .................................................. 18

6.4.4 Dedicated distress button sub procedure ..................................................................................................... 19

6.4.5 Transmission of the alert attempt ................................................................................................................ 20

6.4.6 Updating position ........................................................................................................................................ 20

6.4.7 Handling received DSC Messages .............................................................................................................. 20

6.4.8 Alarms ........................................................................................................................................................ 20

6.4.9 Determining Subsequent communications .................................................................................................. 21

6.4.10 Automated tuning ....................................................................................................................................... 21

6.4.11 Cancelling the Distress Alert ...................................................................................................................... 21

6.4.11.0 General Requirements ........................................................................................................................... 21

6.4.11.1 Examples of cancel-distress displays on VHF equipment..................................................................... 22

6.4.12 Acknowledgments ...................................................................................................................................... 23

6.4.13 Termination................................................................................................................................................. 23

6.4.14 Warnings ..................................................................................................................................................... 23

6.5 Receiving distress automated procedure .......................................................................................................... 23

6.5.1 Procedure .................................................................................................................................................... 23

6.5.2 Tasks ........................................................................................................................................................... 25

6.5.3 Display ........................................................................................................................................................ 25

6.5.3.0 General Display Requirements .............................................................................................................. 25

6.5.3.1 Examples of received distress procedure displays on VHF equipment ................................................. 26

ETSI
---------------------- Page: 3 ----------------------
4 Final draft ETSI EN 300 338-2 V1.5.1 (2020-03)

6.5.4 Handling received DSC Messages .............................................................................................................. 27

6.5.5 Alarms ........................................................................................................................................................ 27

6.5.6 Determining Subsequent communications .................................................................................................. 27

6.5.7 Automated tuning ....................................................................................................................................... 27

6.5.8 Acknowledgments ...................................................................................................................................... 28

6.5.9 Sending Relays and Acknowledgments ...................................................................................................... 28

6.5.10 Termination................................................................................................................................................. 28

6.5.11 Warnings ..................................................................................................................................................... 28

6.5.12 Handling events from man overboard devices (VHF only) ........................................................................ 29

6.5.12.1 General .................................................................................................................................................. 29

6.5.12.2 Display and tasks .................................................................................................................................. 29

6.5.12.3 Handling received DSC messages pertinent to the procedure ............................................................... 30

6.6 Sending non-distress automated procedure ...................................................................................................... 30

6.6.1 Procedure .................................................................................................................................................... 30

6.6.2 Tasks ........................................................................................................................................................... 31

6.6.3 Display ........................................................................................................................................................ 32

6.6.3.0 General Display Requirements .............................................................................................................. 32

6.6.3.1 Examples of sending non-distress procedures displays on VHF equipment ......................................... 33

6.6.4 Handling received DSC Messages .............................................................................................................. 33

6.6.5 Alarms ........................................................................................................................................................ 33

6.6.6 Automated tuning ....................................................................................................................................... 33

6.6.7 Delayed Acknowledgements ...................................................................................................................... 34

6.6.8 Termination................................................................................................................................................. 34

6.6.9 Warnings ..................................................................................................................................................... 34

6.7 Receiving non-distress automated procedure ................................................................................................... 34

6.7.1 Procedure .................................................................................................................................................... 34

6.7.2 Tasks ........................................................................................................................................................... 36

6.7.3 Display ........................................................................................................................................................ 36

6.7.3.0 General Display Requirements .............................................................................................................. 36

6.7.3.1 Examples of receiving non-distress procedures displays on VHF equipment ....................................... 37

6.7.4 Handling received DSC messages .............................................................................................................. 38

6.7.5 Alarms ........................................................................................................................................................ 38

6.7.6 Automated tuning ....................................................................................................................................... 38

6.7.7 Acknowledgments ...................................................................................................................................... 38

6.7.8 Termination................................................................................................................................................. 39

6.7.9 Warnings ..................................................................................................................................................... 39

6.8 Communications automated procedure ............................................................................................................ 39

6.8.1 Procedure .................................................................................................................................................... 39

6.8.2 Tasks ........................................................................................................................................................... 39

6.8.3 Display ........................................................................................................................................................ 40

6.8.4 Handling received DSC Messages .............................................................................................................. 40

6.8.5 Tuning of the general receiver and transmitter ........................................................................................... 40

6.8.6 Termination................................................................................................................................................. 40

6.9 Multiple automated procedures and parallel event handling ............................................................................ 40

6.9.1 Procedure .................................................................................................................................................... 40

6.9.2 Tasks ........................................................................................................................................................... 40

6.9.3 Examples of multiple procedure screens .................................................................................................... 41

Annex A (normative): DSC Message Composition ........................................................................... 43

A.1 Default values ......................................................................................................................................... 43

A.2 The default DROBOSE .......................................................................................................................... 44

A.3 Allowable non-distress DSC message parameters ................................................................................. 44

Annex B (normative): Radius-Centre point conversion and rounding algorithm ......................... 45

B.1 Radius-centre point conversion .............................................................................................................. 45

B.2 Rounding ................................................................................................................................................ 46

B.3 Special cases for either form of area data entry ..................................................................................... 46

ETSI
---------------------- Page: 4 ----------------------
5 Final draft ETSI EN 300 338-2 V1.5.1 (2020-03)

Annex C (normative): Automated Non-Distress Channel/Frequency Selection Algorithm .......... 47

C.0 General ................................................................................................................................................... 47

C.1 VHF ........................................................................................................................................................ 47

C.2 HF ........................................................................................................................................................... 47

Annex D (normative): Alarms ............................................................................................................. 48

D.1 Alarm specifications ............................................................................................................................... 48

D.2 Alarming with critical errors .................................................................................................................. 49

D.3 Default alarm sounds .............................................................................................................................. 49

D.4 Other alarm sounds ................................................................................................................................. 50

History .............................................................................................................................................................. 51

ETSI
---------------------- Page: 5 ----------------------
6 Final draft ETSI EN 300 338-2 V1.5.1 (2020-03)
Intellectual Property Rights
Essential patents

IPRs essential or potentially essential to normative deliverables may have been declared to ETSI. The information

pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found

in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in

respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web

server (https://ipr.etsi.org/).

Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee

can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web

server) which are, or may be, or may become, essential to the present document.
Trademarks

The present document may include trademarks and/or tradenames which are asserted and/or registered by their owners.

ETSI claims no ownership of these except for any which are indicated as being the property of ETSI, and conveys no

right to use or reproduce any trademark and/or tradename. Mention of those trademarks in the present document does

not constitute an endorsement by ETSI of products, services or organizations associated with those trademarks.

Foreword

This final draft European Standard (EN) has been produced by ETSI Technical Committee Electromagnetic

compatibility and Radio spectrum Matters (ERM), and is now submitted for the Vote phase of the ETSI standards EN

Approval Procedure.

The present document is part 2 of a multi-part deliverable. Full details of the entire series can be found in part 1 [i.1].

The present document covers the operator interfaces and operating system for Class A DSC equipment.

Proposed national transposition dates
Date of latest announcement of this EN (doa): 3 months after ETSI publication
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 6 months after doa

Date of withdrawal of any conflicting National Standard (dow): 18 months after doa

Modal verbs terminology

In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and

"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of

provisions).

"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.

ETSI
---------------------- Page: 6 ----------------------
7 Final draft ETSI EN 300 338-2 V1.5.1 (2020-03)
1 Scope

The present document states the minimum requirements for equipment to be used for generation, transmission and

reception of Class A Digital Selective Calling (DSC) for use on board ships.

DSC is intended to be used in the Medium Frequency (MF), High Frequency (HF) and Very High Frequency (VHF)

bands of the Maritime Mobile Service (MMS), for both distress, safety and general communications.

The present document is part 2 of a multi-part deliverable that covers the requirements to be fulfilled by equipment that

is either integrated with a transmitter and/or a receiver or equipment that is a stand-alone DSC terminal and has the

following class of DSC:

• Class A: includes all the facilities defined in annex 1 of Recommendation ITU-R M.493-15 [3] and complies

with the IMO Global Maritime Distress and Safety System (GMDSS) carriage requirements for MF/HF

installations and/or VHF installations.

These requirements include the relevant provisions of the ITU Radio Regulations [2] and Recommendation

ITU-R RM.493-15 [3], the International Convention for the Safety Of Life At Sea (SOLAS) [1], and the relevant

resolutions of the International Maritime Organization (IMO) [4].
2 References
2.1 Normative references

References are either specific (identified by date of publication and/or edition number or version number) or

non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the

referenced document (including any amendments) applies.

Referenced documents which are not found to be publicly available in the expected location might be found at

https://docbox.etsi.org/Reference/.

NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee

their long term validity.

The following referenced documents are necessary for the application of the present document.

[1] International Convention for the Safety of Life at Sea (SOLAS), 1974.
[2] ITU Radio Regulations (2016).

[3] Recommendation ITU-R M.493-15 (01/2019): "Digital selective-calling system for use in the

maritime mobile service".

[4] IMO resolution MSC.97(73), section 14.6.4: "Adoption of the International Code of Safety for

High-Speed Craft, 2000 (2000 HSC Code)".
2.2 Informative references

References are either specific (identified by date of publication and/or edition number or version number) or

non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the

referenced document (including any amendments) applies.

NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee

their long term validity.
ETSI
---------------------- Page: 7 ----------------------
8 Final draft ETSI EN 300 338-2 V1.5.1 (2020-03)

The following referenced documents are not necessary for the application of the present document but they assist the

user with regard to a particular subject area.

[i.1] ETSI EN 300 338-1: "Technical characteristics and methods of measurement for equipment for

generation, transmission and reception of Digital Selective Calling (DSC) in the maritime MF,

MF/HF and/or VHF mobile service; Part 1: Common requirements".

[i.2] MSC 302(87): "Adoption of performance standards for bridge alert management".

[i.3] IEC 61924-2 (Edition 1): "Maritime navigation and radiocommunication equipment and systems --

integrated navigation systems -- Part 2: Modular structure for INS -- operational and performance

requirements, methods of testing and required test results" (including IEC 61924-2 Corrigendum 1

November 2013).

[i.4] ETSI EN 300 338-6: "Technical characteristics and methods of measurement for equipment for

generation, transmission and reception of Digital Selective Calling (DSC) in the maritime MF,

MF/HF and/or VHF mobile service; Part 6: Class M DSC".

[i.5] Recommendation ITU-R M.541-10: "Operational procedures for the use of digital selective-calling

equipment in the maritime mobile service".

[i.6] Recommendation ITU-R M.585-8: "Assignment and use of identities in the maritime mobile

service".
3 Definition of terms, symbols and abbreviations
3.1 Terms

For the purposes of the present document, the terms given in ETSI EN 300 338-1 [i.1] and the following apply:

acknowledged: when the objective of the initial DSC message has been achieved

active: automated procedure which has control of the general receiver and transmitter and is thus able to engage in

subsequent communications and receive DSC messages on both the watch receiver and general receiver

automated procedure: set of actions necessary to complete the objective of an initiating DSC message or non DSC

communication event

NOTE 1: Four DSC automated procedures are designed to process these. They are the receiving of distress DSC

messages, the receiving of non-distress DSC messages, the sending of distress DSC alert attempts and the

sending of non-distress DSC messages. In addition a fifth procedure is designed to handle non DSC

communication events.
NOTE 2: These automated procedures are called:
 Received distress automated procedure.
 Sending distress automated procedure.
 Received non-distress automated procedure.
 Sending non-distress automated procedure.
 Communications automated procedure.

closed loop operation: MOB devices supporting closed loop can be programmed to transmit either an individual

distress relay call (subsequent communication 126) to a vessel or group distress relay call to a group of vessels as

described in Recommendation ITU-R M.493-15 [3]
NOTE: Acknowledgement of these calls is possible.
default: value selected or an action taken by the equipment sof
...

Draft ETSI EN 300 338-2 V1.5.0 (2019-10)
EUROPEAN STANDARD
Technical characteristics and methods of measurement
for equipment for generation, transmission
and reception of Digital Selective Calling (DSC)
in the maritime MF, MF/HF and/or VHF mobile service;
Part 2: Class A DSC
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2 Draft ETSI EN 300 338-2 V1.5.0 (2019-10)
Reference
REN/ERM-TGMAR-593
Keywords
DSC, GMDSS, maritime, radio
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3 Draft ETSI EN 300 338-2 V1.5.0 (2019-10)
Contents

Intellectual Property Rights ................................................................................................................................ 6

Foreword ............................................................................................................................................................. 6

Modal verbs terminology .................................................................................................................................... 6

1 Scope ........................................................................................................................................................ 7

2 References ................................................................................................................................................ 7

2.1 Normative references ......................................................................................................................................... 7

2.2 Informative references ........................................................................................................................................ 8

3 Definition of terms, symbols and abbreviations ....................................................................................... 8

3.1 Terms .................................................................................................................................................................. 8

3.2 Symbols ............................................................................................................................................................ 10

3.3 Abbreviations ................................................................................................................................................... 10

4 Controls and Indicators in Class A DSC Equipment .............................................................................. 10

4.1 Visual indication .............................................................................................................................................. 10

5 Technical requirements .......................................................................................................................... 11

5.1 Facilities for DSC transmission and reception ................................................................................................. 11

5.1.1 Multi-frequency distress alert attempts and watch receiver capabilities (MF/HF) ..................................... 11

5.1.2 Watch receiver capabilities (VHF) ............................................................................................................. 11

5.2 Remote alarms .................................................................................................................................................. 11

5.3 Galvanic isolation ............................................................................................................................................. 11

5.4 Manuals ............................................................................................................................................................ 11

6 Automated and Non-Automated Procedure Requirements in Class A DSC Equipment ....................... 11

6.1 Introduction ...................................................................................................................................................... 11

6.2 Non-automated features ................................................................................................................................... 12

6.2.0 General ........................................................................................................................................................ 12

6.2.1 DSC Message Composition ........................................................................................................................ 12

6.2.2 Transmission of DSC messages and prioritized wait .................................................................................. 13

6.2.3 Alarms ........................................................................................................................................................ 14

6.3 Standby ............................................................................................................................................................. 14

6.4 Sending distress automated procedure ............................................................................................................. 15

6.4.1 Procedure .................................................................................................................................................... 15

6.4.2 Tasks ........................................................................................................................................................... 17

6.4.3 Display ........................................................................................................................................................ 17

6.4.3.0 General Display Requirements .............................................................................................................. 17

6.4.3.1 Examples of sending distress procedure displays on VHF equipment .................................................. 18

6.4.4 Dedicated distress button sub procedure ..................................................................................................... 19

6.4.5 Transmission of the alert attempt ................................................................................................................ 20

6.4.6 Updating position ........................................................................................................................................ 20

6.4.7 Handling received DSC Messages .............................................................................................................. 20

6.4.8 Alarms ........................................................................................................................................................ 20

6.4.9 Determining Subsequent communications .................................................................................................. 21

6.4.10 Automated tuning ....................................................................................................................................... 21

6.4.11 Cancelling the Distress Alert ...................................................................................................................... 21

6.4.11.0 General Requirements ........................................................................................................................... 21

6.4.11.1 Examples of cancel-distress displays on VHF equipment..................................................................... 22

6.4.12 Acknowledgments ...................................................................................................................................... 23

6.4.13 Termination................................................................................................................................................. 23

6.4.14 Warnings ..................................................................................................................................................... 23

6.5 Receiving distress automated procedure .......................................................................................................... 23

6.5.1 Procedure .................................................................................................................................................... 23

6.5.2 Tasks ........................................................................................................................................................... 25

6.5.3 Display ........................................................................................................................................................ 25

6.5.3.0 General Display Requirements .............................................................................................................. 25

6.5.3.1 Examples of received distress procedure displays on VHF equipment ................................................. 26

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4 Draft ETSI EN 300 338-2 V1.5.0 (2019-10)

6.5.4 Handling received DSC Messages .............................................................................................................. 27

6.5.5 Alarms ........................................................................................................................................................ 27

6.5.6 Determining Subsequent communications .................................................................................................. 27

6.5.7 Automated tuning ....................................................................................................................................... 27

6.5.8 Acknowledgments ...................................................................................................................................... 28

6.5.9 Sending Relays and Acknowledgments ...................................................................................................... 28

6.5.10 Termination................................................................................................................................................. 28

6.5.11 Warnings ..................................................................................................................................................... 28

6.5.12 Handling events from man overboard devices (VHF only) ........................................................................ 29

6.5.12.1 General .................................................................................................................................................. 29

6.5.12.2 Display and tasks .................................................................................................................................. 29

6.5.12.3 Handling received DSC messages pertinent to the procedure ............................................................... 30

6.6 Sending non-distress automated procedure ...................................................................................................... 31

6.6.1 Procedure .................................................................................................................................................... 31

6.6.2 Tasks ........................................................................................................................................................... 31

6.6.3 Display ........................................................................................................................................................ 32

6.6.3.0 General Display Requirements .............................................................................................................. 32

6.6.3.1 Examples of sending non-distress procedures displays on VHF equipment ......................................... 33

6.6.4 Handling received DSC Messages .............................................................................................................. 33

6.6.5 Alarms ........................................................................................................................................................ 33

6.6.6 Automated tuning ....................................................................................................................................... 33

6.6.7 Delayed Acknowledgements ...................................................................................................................... 34

6.6.8 Termination................................................................................................................................................. 34

6.6.9 Warnings ..................................................................................................................................................... 34

6.7 Receiving non-distress automated procedure ................................................................................................... 34

6.7.1 Procedure .................................................................................................................................................... 34

6.7.2 Tasks ........................................................................................................................................................... 36

6.7.3 Display ........................................................................................................................................................ 36

6.7.3.0 General Display Requirements .............................................................................................................. 36

6.7.3.1 Examples of receiving non-distress procedures displays on VHF equipment ....................................... 37

6.7.4 Handling received DSC messages .............................................................................................................. 38

6.7.5 Alarms ........................................................................................................................................................ 38

6.7.6 Automated tuning ....................................................................................................................................... 38

6.7.7 Acknowledgments ...................................................................................................................................... 39

6.7.8 Termination................................................................................................................................................. 39

6.7.9 Warnings ..................................................................................................................................................... 39

6.8 Communications automated procedure ............................................................................................................ 40

6.8.1 Procedure .................................................................................................................................................... 40

6.8.2 Tasks ........................................................................................................................................................... 40

6.8.3 Display ........................................................................................................................................................ 40

6.8.4 Handling received DSC Messages .............................................................................................................. 40

6.8.5 Tuning of the general receiver and transmitter ........................................................................................... 40

6.8.6 Termination................................................................................................................................................. 41

6.9 Multiple automated procedures and parallel event handling ............................................................................ 41

6.9.1 Procedure .................................................................................................................................................... 41

6.9.2 Tasks ........................................................................................................................................................... 41

6.9.3 Examples of multiple procedure screens .................................................................................................... 42

Annex A (normative): DSC Message Composition ........................................................................... 43

A.1 Default values ......................................................................................................................................... 43

A.2 The default DROBOSE .......................................................................................................................... 44

A.3 Allowable non-distress DSC message parameters ................................................................................. 44

Annex B (normative): Radius-Centre point conversion and rounding algorithm ......................... 45

B.1 Radius-centre point conversion .............................................................................................................. 45

B.2 Rounding ................................................................................................................................................ 46

B.3 Special cases for either form of area data entry ..................................................................................... 46

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5 Draft ETSI EN 300 338-2 V1.5.0 (2019-10)

Annex C (normative): Automated Non-Distress Channel/Frequency Selection Algorithm .......... 47

C.0 General ................................................................................................................................................... 47

C.1 VHF ........................................................................................................................................................ 47

C.2 HF ........................................................................................................................................................... 47

Annex D (normative): Alarms ............................................................................................................. 48

D.1 Alarm specifications ............................................................................................................................... 48

D.2 Alarming with critical errors .................................................................................................................. 49

D.3 Default alarm sounds .............................................................................................................................. 49

D.4 Other alarm sounds ................................................................................................................................. 50

History .............................................................................................................................................................. 51

ETSI
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6 Draft ETSI EN 300 338-2 V1.5.0 (2019-10)
Intellectual Property Rights
Essential patents

IPRs essential or potentially essential to normative deliverables may have been declared to ETSI. The information

pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found

in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in

respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web

server (https://ipr.etsi.org/).

Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee

can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web

server) which are, or may be, or may become, essential to the present document.
Trademarks

The present document may include trademarks and/or tradenames which are asserted and/or registered by their owners.

ETSI claims no ownership of these except for any which are indicated as being the property of ETSI, and conveys no

right to use or reproduce any trademark and/or tradename. Mention of those trademarks in the present document does

not constitute an endorsement by ETSI of products, services or organizations associated with those trademarks.

Foreword

This draft European Standard (EN) has been produced by ETSI Technical Committee Electromagnetic compatibility

and Radio spectrum Matters (ERM), and is now submitted for the combined Public Enquiry and Vote phase of the ETSI

standards EN Approval Procedure.

The present document is part 2 of a multi-part deliverable. Full details of the entire series can be found in part 1 [i.1].

The present document covers the operator interfaces and operating system for Class A DSC equipment.

Proposed national transposition dates
Date of latest announcement of this EN (doa): 3 months after ETSI publication
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 6 months after doa

Date of withdrawal of any conflicting National Standard (dow): 18 months after doa

Modal verbs terminology

In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and

"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of

provisions).

"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.

ETSI
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7 Draft ETSI EN 300 338-2 V1.5.0 (2019-10)
1 Scope

The present document states the minimum requirements for equipment to be used for generation, transmission and

reception of Class A Digital Selective Calling (DSC) for use on board ships.

DSC is intended to be used in the Medium Frequency (MF), High Frequency (HF) and Very High Frequency (VHF)

bands of the Maritime Mobile Service (MMS), for both distress, safety and general communications.

The present document is part 2 of a multi-part deliverable that covers the requirements to be fulfilled by equipment that

is either integrated with a transmitter and/or a receiver or equipment that is a stand-alone DSC terminal and has the

following class of DSC:

• Class A: includes all the facilities defined in annex 1 of Recommendation ITU-R M.493-15 [3] and complies

with the IMO Global Maritime Distress and Safety System (GMDSS) carriage requirements for MF/HF

installations and/or VHF installations.

These requirements include the relevant provisions of the ITU Radio Regulations [2] and Recommendation

ITU-R RM.493-15 [3], the International Convention for the Safety Of Life At Sea (SOLAS) [1], and the relevant

resolutions of the International Maritime Organization (IMO) [4].
2 References
2.1 Normative references

References are either specific (identified by date of publication and/or edition number or version number) or

non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the

referenced document (including any amendments) applies.

Referenced documents which are not found to be publicly available in the expected location might be found at

https://docbox.etsi.org/Reference/.

NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee

their long term validity.

The following referenced documents are necessary for the application of the present document.

[1] "International Convention for the Safety of Life at Sea (SOLAS)", 1974.
[2] ITU Radio Regulations (2016).

[3] Recommendation ITU-R M.493-15 (01/2019): "Digital selective-calling system for use in the

maritime mobile service".

[4] IMO resolution MSC.97(73), section 14.6.4: "Adoption of the International Code of Safety for

High-Speed Craft, 2000 (2000 HSC Code)".
ETSI
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8 Draft ETSI EN 300 338-2 V1.5.0 (2019-10)
2.2 Informative references

References are either specific (identified by date of publication and/or edition number or version number) or

non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the

referenced document (including any amendments) applies.

NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee

their long term validity.

The following referenced documents are not necessary for the application of the present document but they assist the

user with regard to a particular subject area.

[i.1] ETSI EN 300 338-1: "Technical characteristics and methods of measurement for equipment for

generation, transmission and reception of Digital Selective Calling (DSC) in the maritime MF,

MF/HF and/or VHF mobile service; Part 1: Common requirements".

[i.2] MSC 302(87): "Adoption of performance standards for bridge alert management".

[i.3] IEC 61924-2 (Edition 1): "Maritime navigation and radiocommunication equipment and systems --

integrated navigation systems -- Part 2: Modular structure for INS -- operational and performance

requirements, methods of testing and required test results" (including IEC 61924-2 Corrigendum

1 November 2013).

[i.4] ETSI EN 300 338-6: "Technical characteristics and methods of measurement for equipment for

generation, transmission and reception of Digital Selective Calling (DSC) in the maritime MF,

MF/HF and/or VHF mobile service; Part 6: Class M DSC".

[i.5] Recommendation ITU-R M.541-10: "Operational procedures for the use of digital selective-calling

equipment in the maritime mobile service".

[i.6] Recommendation ITU-R M.585-7: "Assignment and use of identities in the maritime mobile

service".
3 Definition of terms, symbols and abbreviations
3.1 Terms

For the purposes of the present document, the terms given in ETSI EN 300 338-1 [i.1] and the following apply:

acknowledged: when the objective of the initial DSC message has been achieved

active: automated procedure which has control of the general receiver and transmitter and is thus able to engage in

subsequent communications and receive DSC messages on both the watch receiver and general receiver

automated procedure: set of actions necessary to complete the objective of an initiating DSC message or non DSC

communication event

NOTE 1: Four DSC automated procedures are designed to process these. They are the receiving of distress DSC

messages, the receiving of non-distress DSC messages, the sending of distress DSC alert attempts and the

sending of non-distress DSC messages. In addition a fifth procedure is designed to handle non DSC

communication events.
NOTE 2: These automated procedures are called:
 Received distress automated procedure.
 Sending distress automated procedure.
 Received non-distress automated procedure.
 Sending non-distress automated procedure.
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9 Draft ETSI EN 300 338-2 V1.5.0 (2019-10)
 Communications automated procedure.

closed loop operation: MOB devices supporting closed loop can be programmed to transmit either an individual

distress relay call (subsequent communication 126) to a vessel or group distress relay call to a group of vessels as

described in Recommendation ITU-R M.493-15 [3]
NOTE: Acknowledgement of these calls is
...

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