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

The present document states the minimum requirements for devices using Digital Selective Calling (DSC) Class M, for
Man Overboard (MOB). The present document defines the requirements for equipment that uses DSC alerting and
signalling in the maritime mobile bands and particularly the GMDSS distress and safety channels. Such equipment is
not intended to provide any subsequent communications or telephony facilities.
The present document is part 6 of a multi-part deliverable that covers the channel access rules and technical
requirements applicable to these devices.

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 - 6. del: Digitalni selektivni klic razreda M

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 300 338-6 V1.2.1 (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 6: Class M DSC
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ETSI EN 300 338-6 V1.2.1 (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 6: Class M DSC
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ETSI EN 300 338-6 V1.2.0 (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 6: Class M DSC
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SLOVENSKI STANDARD
SIST EN 300 338-6 V1.2.1:2020
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 - 6. del: Digitalni selektivni klic razreda M

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
Ta slovenski standard je istoveten z: ETSI EN 300 338-6 V1.2.1 (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 300 338-6 V1.2.1:2020 en

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

---------------------- Page: 1 ----------------------
SIST EN 300 338-6 V1.2.1:2020
---------------------- Page: 2 ----------------------
SIST EN 300 338-6 V1.2.1:2020
ETSI EN 300 338-6 V1.2.1 (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 6: Class M DSC
---------------------- Page: 3 ----------------------
SIST EN 300 338-6 V1.2.1:2020
2 ETSI EN 300 338-6 V1.2.1 (2020-06)
Reference
REN/ERM-TGMAR-601
Keywords
DSC, GMDSS, maritime, radio, SAR
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 300 338-6 V1.2.1:2020
3 ETSI EN 300 338-6 V1.2.1 (2020-06)
Contents

Intellectual Property Rights ................................................................................................................................ 4

Foreword ............................................................................................................................................................. 4

Modal verbs terminology .................................................................................................................................... 4

1 Scope ........................................................................................................................................................ 5

2 References ................................................................................................................................................ 5

2.1 Normative references ......................................................................................................................................... 5

2.2 Informative references ........................................................................................................................................ 5

3 Definition of terms, symbols and abbreviations ....................................................................................... 6

3.1 Terms .................................................................................................................................................................. 6

3.2 Symbols .............................................................................................................................................................. 6

3.3 Abbreviations ..................................................................................................................................................... 7

4 General requirements ............................................................................................................................... 7

4.1 General ............................................................................................................................................................... 7

4.2 Frequency of operation ....................................................................................................................................... 7

4.3 Class of emission ................................................................................................................................................ 7

4.4 Controls .............................................................................................................................................................. 8

4.5 Indicators ............................................................................................................................................................ 8

4.5.0 General .......................................................................................................................................................... 8

4.5.1 Audible indicators ......................................................................................................................................... 8

4.5.2 Visual Indicators ........................................................................................................................................... 8

4.6 Labelling............................................................................................................................................................. 8

4.7 Instructions ......................................................................................................................................................... 9

4.8 Self ID ................................................................................................................................................................ 9

4.9 Own vessel MMSI .............................................................................................................................................. 9

4.10 Battery requirement ............................................................................................................................................ 9

5 DSC Operation ....................................................................................................................................... 10

5.1 Listen Before Talk (LBT) Protocol .................................................................................................................. 10

5.1.0 General ........................................................................................................................................................ 10

5.1.1 Active Mode Wait Period Calculation ........................................................................................................ 10

5.1.2 Test Mode Wait Period Calculation ............................................................................................................ 10

5.2 DSC messages .................................................................................................................................................. 10

5.2.1 Active mode ................................................................................................................................................ 10

5.2.1.0 General .................................................................................................................................................. 10

5.2.1.1 Closed loop operation ........................................................................................................................... 10

5.2.1.2 Open loop operation .............................................................................................................................. 11

5.2.1.3 Distress self-cancel................................................................................................................................ 11

5.2.2 Test mode.................................................................................................................................................... 12

5.3 Action on receipt of acknowledgment messages to alerts ................................................................................ 12

6 Internal electronic position fixing device ............................................................................................... 12

Annex A (informative): Change History .............................................................................................. 13

History .............................................................................................................................................................. 14

ETSI
---------------------- Page: 5 ----------------------
SIST EN 300 338-6 V1.2.1:2020
4 ETSI EN 300 338-6 V1.2.1 (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 6 of a multi-part deliverable. Full details of the entire series can be found in part 1 [i.1].

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 ----------------------
SIST EN 300 338-6 V1.2.1:2020
5 ETSI EN 300 338-6 V1.2.1 (2020-06)
1 Scope

The present document states the minimum requirements for devices using Digital Selective Calling (DSC) Class M, for

Man Overboard (MOB). The present document defines the requirements for equipment that uses DSC alerting and

signalling in the maritime mobile bands and particularly the GMDSS distress and safety channels. Such equipment is

not intended to provide any subsequent communications or telephony facilities.

The present document is part 6 of a multi-part deliverable that covers the channel access rules and technical

requirements applicable to these devices.
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] Recommendation ITU-R M.493-15 (01/2019): "Digital selective-calling system for use in the

maritime mobile service".

[2] ETSI EN 303 098: "Maritime low power personal locating devices employing AIS; Harmonised

Standard for access to radio spectrum".

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

service".

[4] Recommendation ITU-R M.821-1: "Optional expansion of the digital selective-calling system for

use in the maritime mobile service".

[5] CENELEC EN 61108-1: "Maritime navigation and radiocommunication equipment and systems -

Global navigation satellite systems (GNSS) - Part 1: Global positioning system (GPS) - Receiver

equipment - Performance standards, methods of testing and required test results".

[6] CENELEC EN 61108-2: "Maritime navigation and radiocommunication equipment and systems -

Global navigation satellite systems (GNSS) - Part 2: Global navigation satellite system

(GLONASS) - Receiver equipment - Performance standards, methods of testing and required test

results".

[7] CENELEC EN 61108-3: "Maritime navigation and radiocommunication equipment and systems -

Global navigation satellite systems (GNSS) - Part 3: Galileo receiver equipment - Performance

requirements, methods of testing and required test results".
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 ----------------------
SIST EN 300 338-6 V1.2.1:2020
6 ETSI EN 300 338-6 V1.2.1 (2020-06)

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".
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: automated procedure which indicates that the objective of the initial DSC message has been achieved

activation: initial triggering of the MoB device i.e. both parts of the two step procedure are performed

active mode: activated mode, transmitting in an emergency situation
class M: specific class of DSC functionality for use by man overboard devices
closed loop: individual transmission to own vessel

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

distress alert: name given to the single distress DSC message with the format symbol 112

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

distress information: symbols within a DSC message describing a distress situation consisting of the MMSI of the

vessel in distress, the nature of distress, the position of the vessel in distress, the UTC time of that position and the mode

of subsequent communication

factory default: default value that is set by the manufacturer such that the field or behaviour is defined prior to any

operator intervention

information characters: set of symbols in a DSC message that contains the items of interest for the recipient and is

used to compute the ECC symbol that terminates the message

non distress DSC message: DSC messages or acknowledgements that do not have the format specifier or category of

"distress"
open loop: transmitting to all ships (broadcast) 'using All ships call types'

symbol (as part of the DSC sentence): 7 binary bits of a 10 bit DSC word that have the information content

test mode: self-testing mode using an individual test call to own vessel

word (as part of the DSC sentence): 10 binary bits that make up the coded entities of a transmitted DSC message

NOTE: The 10 bits consist of a 7 bit "symbol" that gives the information content and 3 bit error check that gives

the number of 0 binary bits in the 7 bit symbol.
3.2 Symbols
Void.
ETSI
---------------------- Page: 8 ----------------------
SIST EN 300 338-6 V1.2.1:2020
7 ETSI EN 300 338-6 V1.2.1 (2020-06)
3.3 Abbreviations
For the purposes of the present document, the following abbreviations apply:
AIS Automatic Identification System
CIRM Comité
...

ETSI EN 300 338-6 V1.2.1 (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 6: Class M DSC
---------------------- Page: 1 ----------------------
2 ETSI EN 300 338-6 V1.2.1 (2020-06)
Reference
REN/ERM-TGMAR-601
Keywords
DSC, GMDSS, maritime, radio, SAR
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 300 338-6 V1.2.1 (2020-06)
Contents

Intellectual Property Rights ................................................................................................................................ 4

Foreword ............................................................................................................................................................. 4

Modal verbs terminology .................................................................................................................................... 4

1 Scope ........................................................................................................................................................ 5

2 References ................................................................................................................................................ 5

2.1 Normative references ......................................................................................................................................... 5

2.2 Informative references ........................................................................................................................................ 5

3 Definition of terms, symbols and abbreviations ....................................................................................... 6

3.1 Terms .................................................................................................................................................................. 6

3.2 Symbols .............................................................................................................................................................. 6

3.3 Abbreviations ..................................................................................................................................................... 7

4 General requirements ............................................................................................................................... 7

4.1 General ............................................................................................................................................................... 7

4.2 Frequency of operation ....................................................................................................................................... 7

4.3 Class of emission ................................................................................................................................................ 7

4.4 Controls .............................................................................................................................................................. 8

4.5 Indicators ............................................................................................................................................................ 8

4.5.0 General .......................................................................................................................................................... 8

4.5.1 Audible indicators ......................................................................................................................................... 8

4.5.2 Visual Indicators ........................................................................................................................................... 8

4.6 Labelling............................................................................................................................................................. 8

4.7 Instructions ......................................................................................................................................................... 9

4.8 Self ID ................................................................................................................................................................ 9

4.9 Own vessel MMSI .............................................................................................................................................. 9

4.10 Battery requirement ............................................................................................................................................ 9

5 DSC Operation ....................................................................................................................................... 10

5.1 Listen Before Talk (LBT) Protocol .................................................................................................................. 10

5.1.0 General ........................................................................................................................................................ 10

5.1.1 Active Mode Wait Period Calculation ........................................................................................................ 10

5.1.2 Test Mode Wait Period Calculation ............................................................................................................ 10

5.2 DSC messages .................................................................................................................................................. 10

5.2.1 Active mode ................................................................................................................................................ 10

5.2.1.0 General .................................................................................................................................................. 10

5.2.1.1 Closed loop operation ........................................................................................................................... 10

5.2.1.2 Open loop operation .............................................................................................................................. 11

5.2.1.3 Distress self-cancel................................................................................................................................ 11

5.2.2 Test mode.................................................................................................................................................... 12

5.3 Action on receipt of acknowledgment messages to alerts ................................................................................ 12

6 Internal electronic position fixing device ............................................................................................... 12

Annex A (informative): Change History .............................................................................................. 13

History .............................................................................................................................................................. 14

ETSI
---------------------- Page: 3 ----------------------
4 ETSI EN 300 338-6 V1.2.1 (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 6 of a multi-part deliverable. Full details of the entire series can be found in part 1 [i.1].

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: 4 ----------------------
5 ETSI EN 300 338-6 V1.2.1 (2020-06)
1 Scope

The present document states the minimum requirements for devices using Digital Selective Calling (DSC) Class M, for

Man Overboard (MOB). The present document defines the requirements for equipment that uses DSC alerting and

signalling in the maritime mobile bands and particularly the GMDSS distress and safety channels. Such equipment is

not intended to provide any subsequent communications or telephony facilities.

The present document is part 6 of a multi-part deliverable that covers the channel access rules and technical

requirements applicable to these devices.
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] Recommendation ITU-R M.493-15 (01/2019): "Digital selective-calling system for use in the

maritime mobile service".

[2] ETSI EN 303 098: "Maritime low power personal locating devices employing AIS; Harmonised

Standard for access to radio spectrum".

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

service".

[4] Recommendation ITU-R M.821-1: "Optional expansion of the digital selective-calling system for

use in the maritime mobile service".

[5] CENELEC EN 61108-1: "Maritime navigation and radiocommunication equipment and systems -

Global navigation satellite systems (GNSS) - Part 1: Global positioning system (GPS) - Receiver

equipment - Performance standards, methods of testing and required test results".

[6] CENELEC EN 61108-2: "Maritime navigation and radiocommunication equipment and systems -

Global navigation satellite systems (GNSS) - Part 2: Global navigation satellite system

(GLONASS) - Receiver equipment - Performance standards, methods of testing and required test

results".

[7] CENELEC EN 61108-3: "Maritime navigation and radiocommunication equipment and systems -

Global navigation satellite systems (GNSS) - Part 3: Galileo receiver equipment - Performance

requirements, methods of testing and required test results".
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: 5 ----------------------
6 ETSI EN 300 338-6 V1.2.1 (2020-06)

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".
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: automated procedure which indicates that the objective of the initial DSC message has been achieved

activation: initial triggering of the MoB device i.e. both parts of the two step procedure are performed

active mode: activated mode, transmitting in an emergency situation
class M: specific class of DSC functionality for use by man overboard devices
closed loop: individual transmission to own vessel

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

distress alert: name given to the single distress DSC message with the format symbol 112

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

distress information: symbols within a DSC message describing a distress situation consisting of the MMSI of the

vessel in distress, the nature of distress, the position of the vessel in distress, the UTC time of that position and the mode

of subsequent communication

factory default: default value that is set by the manufacturer such that the field or behaviour is defined prior to any

operator intervention

information characters: set of symbols in a DSC message that contains the items of interest for the recipient and is

used to compute the ECC symbol that terminates the message

non distress DSC message: DSC messages or acknowledgements that do not have the format specifier or category of

"distress"
open loop: transmitting to all ships (broadcast) 'using All ships call types'

symbol (as part of the DSC sentence): 7 binary bits of a 10 bit DSC word that have the information content

test mode: self-testing mode using an individual test call to own vessel

word (as part of the DSC sentence): 10 binary bits that make up the coded entities of a transmitted DSC message

NOTE: The 10 bits consist of a 7 bit "symbol" that gives the information content and 3 bit error check that gives

the number of 0 binary bits in the 7 bit symbol.
3.2 Symbols
Void.
ETSI
---------------------- Page: 6 ----------------------
7 ETSI EN 300 338-6 V1.2.1 (2020-06)
3.3 Abbreviations
For the purposes of the present document, the following abbreviations apply:
AIS Automatic Identification System
CIRM Comité International Radio-Maritime
DSC Digital Selective Calling
ECC Error Check Character
GMDSS Global Maritime Distress and Safety System
GMSK Gaussian Minimum Shift Keying
GNSS Global Navigation Satellite System
GPS Global Positioning System
HF High Frequency
ID IDentity
ITU International Telecommunications Union
ITU-R ITU - Radiocommunications sector
LBT Listen Before Talk
MF Medium Frequency
MMSI Maritime Mobile Service Identity
MOB Man Overboard
PM Phase Modulation
UTC Universal Time Co-ordinated
...

Final draft ETSI EN 300 338-6 V1.2.1 (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 6: Class M DSC
---------------------- Page: 1 ----------------------
2 Final draft ETSI EN 300 338-6 V1.2.1 (2020-03)
Reference
REN/ERM-TGMAR-601
Keywords
DSC, GMDSS, maritime, radio, SAR
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 Final draft ETSI EN 300 338-6 V1.2.1 (2020-03)
Contents

Intellectual Property Rights ................................................................................................................................ 4

Foreword ............................................................................................................................................................. 4

Modal verbs terminology .................................................................................................................................... 4

1 Scope ........................................................................................................................................................ 5

2 References ................................................................................................................................................ 5

2.1 Normative references ......................................................................................................................................... 5

2.2 Informative references ........................................................................................................................................ 5

3 Definition of terms, symbols and abbreviations ....................................................................................... 6

3.1 Terms .................................................................................................................................................................. 6

3.2 Symbols .............................................................................................................................................................. 6

3.3 Abbreviations ..................................................................................................................................................... 7

4 General requirements ............................................................................................................................... 7

4.1 General ............................................................................................................................................................... 7

4.2 Frequency of operation ....................................................................................................................................... 7

4.3 Class of emission ................................................................................................................................................ 7

4.4 Controls .............................................................................................................................................................. 8

4.5 Indicators ............................................................................................................................................................ 8

4.5.0 General .......................................................................................................................................................... 8

4.5.1 Audible indicators ......................................................................................................................................... 8

4.5.2 Visual Indicators ........................................................................................................................................... 8

4.6 Labelling............................................................................................................................................................. 8

4.7 Instructions ......................................................................................................................................................... 9

4.8 Self ID ................................................................................................................................................................ 9

4.9 Own vessel MMSI .............................................................................................................................................. 9

4.10 Battery requirement ............................................................................................................................................ 9

5 DSC Operation ....................................................................................................................................... 10

5.1 Listen Before Talk (LBT) Protocol .................................................................................................................. 10

5.1.0 General ........................................................................................................................................................ 10

5.1.1 Active Mode Wait Period Calculation ........................................................................................................ 10

5.1.2 Test Mode Wait Period Calculation ............................................................................................................ 10

5.2 DSC messages .................................................................................................................................................. 10

5.2.1 Active mode ................................................................................................................................................ 10

5.2.1.0 General .................................................................................................................................................. 10

5.2.1.1 Closed loop operation ........................................................................................................................... 10

5.2.1.2 Open loop operation .............................................................................................................................. 11

5.2.1.3 Distress self-cancel................................................................................................................................ 11

5.2.2 Test mode.................................................................................................................................................... 12

5.3 Action on receipt of acknowledgment messages to alerts ................................................................................ 12

6 Internal electronic position fixing device ............................................................................................... 12

Annex A (informative): Change History .............................................................................................. 13

History .............................................................................................................................................................. 14

ETSI
---------------------- Page: 3 ----------------------
4 Final draft ETSI EN 300 338-6 V1.2.1 (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 6 of a multi-part deliverable. Full details of the entire series can be found in part 1 [i.1].

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: 4 ----------------------
5 Final draft ETSI EN 300 338-6 V1.2.1 (2020-03)
1 Scope

The present document states the minimum requirements for devices using Digital Selective Calling (DSC) Class M, for

Man Overboard (MOB). The present document defines the requirements for equipment that uses DSC alerting and

signalling in the maritime mobile bands and particularly the GMDSS distress and safety channels. Such equipment is

not intended to provide any subsequent communications or telephony facilities.

The present document is part 6 of a multi-part deliverable that covers the channel access rules and technical

requirements applicable to these devices.
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] Recommendation ITU-R M.493-15 (01/2019): "Digital selective-calling system for use in the

maritime mobile service".

[2] ETSI EN 303 098: "Maritime low power personal locating devices employing AIS; Harmonised

Standard for access to radio spectrum".

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

service".

[4] Recommendation ITU-R M.821-1: "Optional expansion of the digital selective-calling system for

use in the maritime mobile service".

[5] CENELEC EN 61108-1: "Maritime navigation and radiocommunication equipment and systems -

Global navigation satellite systems (GNSS) - Part 1: Global positioning system (GPS) - Receiver

equipment - Performance standards, methods of testing and required test results".

[6] CENELEC EN 61108-2: "Maritime navigation and radiocommunication equipment and systems -

Global navigation satellite systems (GNSS) - Part 2: Global navigation satellite system

(GLONASS) - Receiver equipment - Performance standards, methods of testing and required test

results".

[7] CENELEC EN 61108-3: "Maritime navigation and radiocommunication equipment and systems -

Global navigation satellite systems (GNSS) - Part 3: Galileo receiver equipment - Performance

requirements, methods of testing and required test results".
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: 5 ----------------------
6 Final draft ETSI EN 300 338-6 V1.2.1 (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".
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: automated procedure which indicates that the objective of the initial DSC message has been achieved

activation: initial triggering of the MoB device i.e. both parts of the two step procedure are performed

active mode: activated mode, transmitting in an emergency situation
class M: specific class of DSC functionality for use by man overboard devices
closed loop: individual transmission to own vessel

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

distress alert: name given to the single distress DSC message with the format symbol 112

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

distress information: symbols within a DSC message describing a distress situation consisting of the MMSI of the

vessel in distress, the nature of distress, the position of the vessel in distress, the UTC time of that position and the mode

of subsequent communication

factory default: default value that is set by the manufacturer such that the field or behaviour is defined prior to any

operator intervention

information characters: set of symbols in a DSC message that contains the items of interest for the recipient and is

used to compute the ECC symbol that terminates the message

non distress DSC message: DSC messages or acknowledgements that do not have the format specifier or category of

"distress"
open loop: transmitting to all ships (broadcast) 'using All ships call types'

symbol (as part of the DSC sentence): 7 binary bits of a 10 bit DSC word that have the information content

test mode: self-testing mode using an individual test call to own vessel

word (as part of the DSC sentence): 10 binary bits that make up the coded entities of a transmitted DSC message

NOTE: The 10 bits consist of a 7 bit "symbol" that gives the information content and 3 bit error check that gives

the number of 0 binary bits in the 7 bit symbol.
3.2 Symbols
Void.
ETSI
---------------------- Page: 6 ----------------------
7 Final draft ETSI EN 300 338-6 V1.2.1 (2020-03)
3.3 Abbreviations
For the purposes of the present document, the following abbreviations apply:
AIS Automatic Identification System
CIRM Comité International Radio-Maritime
DSC Digital Selective Calling
ECC Error Check Character
GMDSS Global Maritime Distress and Safety System
GMSK Gaussian Minimum Shift Keying
GNSS Global Navigation Satellite System
GPS Global Positioning System
HF High Frequency
ID IDentity
ITU International Telecommunications Union
ITU-R ITU - Radiocommunications sector
LBT Listen Before Talk
MF Medium Frequency
MMSI Maritime Mobile Service Identity
MOB Man Overboard
...

Draft ETSI EN 300 338-6 V1.2.0 (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 6: Class M DSC
---------------------- Page: 1 ----------------------
2 Draft ETSI EN 300 338-6 V1.2.0 (2019-10)
Reference
REN/ERM-TGMAR-601
Keywords
DSC, GMDSS, maritime, radio, SAR
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 2019.
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 Draft ETSI EN 300 338-6 V1.2.0 (2019-10)
Contents

Intellectual Property Rights ................................................................................................................................ 4

Foreword ............................................................................................................................................................. 4

Modal verbs terminology .................................................................................................................................... 4

1 Scope ........................................................................................................................................................ 5

2 References ................................................................................................................................................ 5

2.1 Normative references ......................................................................................................................................... 5

2.2 Informative references ........................................................................................................................................ 6

3 Definition of terms, symbols and abbreviations ....................................................................................... 6

3.1 Terms .................................................................................................................................................................. 6

3.2 Symbols .............................................................................................................................................................. 7

3.3 Abbreviations ..................................................................................................................................................... 7

4 General requirements ............................................................................................................................... 7

4.1 General ............................................................................................................................................................... 7

4.2 Frequency of operation ....................................................................................................................................... 7

4.3 Class of emission ................................................................................................................................................ 8

4.4 Controls .............................................................................................................................................................. 8

4.5 Indicators ............................................................................................................................................................ 8

4.5.0 General .......................................................................................................................................................... 8

4.5.1 Audible indicators ......................................................................................................................................... 8

4.5.2 Visual Indicators ........................................................................................................................................... 8

4.6 Labelling............................................................................................................................................................. 8

4.7 Instructions ......................................................................................................................................................... 9

4.8 Self ID ................................................................................................................................................................ 9

4.9 Own vessel MMSI .............................................................................................................................................. 9

4.10 Battery requirement ............................................................................................................................................ 9

5 DSC Operation ....................................................................................................................................... 10

5.1 Listen Before Talk (LBT) Protocol .................................................................................................................. 10

5.1.0 General ........................................................................................................................................................ 10

5.1.1 Active Mode Wait Period Calculation ........................................................................................................ 10

5.1.2 Test Mode Wait Period Calculation ............................................................................................................ 10

5.2 DSC messages .................................................................................................................................................. 10

5.2.1 Active mode ................................................................................................................................................ 10

5.2.1.0 General .................................................................................................................................................. 10

5.2.1.1 Closed loop operation ........................................................................................................................... 11

5.2.1.2 Open loop operation .............................................................................................................................. 11

5.2.1.3 Distress self-cancel................................................................................................................................ 12

5.2.2 Test mode.................................................................................................................................................... 12

5.3 Action on receipt of acknowledgment messages to alerts ................................................................................ 12

6 Internal electronic position fixing device ............................................................................................... 12

Annex A (informative): Change History .............................................................................................. 13

History .............................................................................................................................................................. 14

ETSI
---------------------- Page: 3 ----------------------
4 Draft ETSI EN 300 338-6 V1.2.0 (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 6 of a multi-part deliverable. Full details of the entire series can be found in part 1 [i.1].

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: 4 ----------------------
5 Draft ETSI EN 300 338-6 V1.2.0 (2019-10)
1 Scope

The present document states the minimum requirements for devices using Digital Selective Calling (DSC) Class M, for

Man Overboard (MOB). The present document defines the requirements for equipment that uses DSC alerting and

signalling in the maritime mobile bands and particularly the GMDSS distress and safety channels. Such equipment is

not intended to provide any subsequent communications or telephony facilities.

The present document is part 6 of a multi-part deliverable that covers the channel access rules and technical

requirements applicable to these devices.
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] Recommendation ITU-R M.493-15 (01/2019): "Digital selective-calling system for use in the

maritime mobile service".

[2] ETSI EN 303 098: "Maritime low power personal locating devices employing AIS; Harmonised

Standard for access to radio spectrum".

[3] Recommendation ITU-R M.585-7: "Assignment and use of identities in the maritime mobile

service".

[4] Recommendation ITU-R M.821-1: "Optional expansion of the digital selective-calling system for

use in the maritime mobile service".

[5] CENELEC EN 61108-1: "Maritime navigation and radiocommunication equipment and systems -

Global navigation satellite systems (GNSS) - Part 1: Global positioning system (GPS) - Receiver

equipment - Performance standards, methods of testing and required test results".

[6] CENELEC EN 61108-2: "Maritime navigation and radiocommunication equipment and systems -

Global navigation satellite systems (GNSS) - Part 2: Global navigation satellite system

(GLONASS) - Receiver equipment - Performance standards, methods of testing and required test

results".

[7] CENELEC EN 61108-3: "Maritime navigation and radiocommunication equipment and systems -

Global navigation satellite systems (GNSS) - Part 3: Galileo receiver equipment - Performance

requirements, methods of testing and required test results".
ETSI
---------------------- Page: 5 ----------------------
6 Draft ETSI EN 300 338-6 V1.2.0 (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".
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: automated procedure which indicates that the objective of the initial DSC message has been achieved

activation: initial triggering of the MoB device i.e. both parts of the two step procedure are performed

active mode: activated mode, transmitting in an emergency situation
class M: specific class of DSC functionality for use by man overboard devices
closed loop: individual transmission to own vessel

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

distress alert: name given to the single distress DSC message with the format symbol 112

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

distress information: symbols within a DSC message describing a distress situation consisting of the MMSI of the

vessel in distress, the nature of distress, the position of the vessel in distress, the UTC time of that position and the mode

of subsequent communication

factory default: default value that is set by the manufacturer such that the field or behaviour is defined prior to any

operator intervention

information characters: set of symbols in a DSC message that contains the items of interest for the recipient and is

used to compute the ECC symbol that terminates the message

non distress DSC message: DSC messages or acknowledgements that do not have the format specifier or category of

"distress"
open loop: transmitting to all ships (broadcast) 'using All ships call types'

symbol (as part of the DSC sentence): 7 binary bits of a 10 bit DSC word that have the information content

test mode: self-testing mode using an individual test call to own vessel

word (as part of the DSC sentence): 10 binary bits that make up the coded entities of a transmitted DSC message

NOTE: The 10 bits consist of a 7 bit "symbol" that gives the information content and 3 bit error check that gives

the number of 0 binary bits in the 7 bit symbol.
ETSI
---------------------- Page: 6 ----------------------
7 Draft ETSI EN 300 338-6 V1.2.0 (2019-10)
3.2 Symbols
Void.
3.3 Abbreviations
For the purposes of the present document, the following abbreviations apply:
AIS Automatic Identification System
CIRM Comite International Radio-Maritime
DSC Digital Selective Calling
ECC Error Check Character
GMDSS Global Maritime Distress and Safety System
GMSK Gaussian Minimum Shift Keying
GNSS Global Navigation Satellite System
GPS Global Positioning System
HF High Frequency
ID IDentity
ITU International Telecommunications Union
ITU-R ITU - Radiocommunications Sector
LBT Listen Before Talk
MF Medium Frequency
MMSI Maritime Mobile Service Identity
MOB Man Overboard
PM Phase Modulation
UTC
...

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