SIST EN 300 338-2 V1.3.1:2010

Electromagnetic compatibility and Radio spectrum Matters (ERM) - 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/B DSC

The present document states the minimum requirements for equipment to be used for generation, transmission and reception of Class A or B 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 ITU-R Recommendation M.493-12 [3] and complies with the IMO Global Maritime Distress and Safety System (GMDSS) carriage requirements for MF/HF installations and/or VHF installations;
- Class B: provides minimum facilities for equipment on ships not required to use class A equipment and complies with the minimum IMO GMDSS carriage requirements for MF and/or VHF installations. This equipment should provide for:
- alerting, acknowledgement and relay facilities for distress purposes;
- calling and acknowledgement for general communication purposes; and
- calling in connection with semi-automatic/automatic services, as defined in ITU-R Recommendation M.493-12 [3], annex 2, clause 3.
These requirements include the relevant provisions of the ITU Radio Regulations [2] and ITU-R Recommendations, the International Convention for the Safety Of Life At Sea (SOLAS) [1], and the relevant resolutions of the International Maritime Organization (IMO).

Elektromagnetna združljivost in zadeve v zvezi z radijskim spektrom (ERM) - Tehnične karakteristike in merilne metode za naprave, ki generirajo, oddajajo in sprejemajo digitalni selektivni klic (DSC) v pomorski mobilni storitvi, ki obratuje v MF, MF/HF oziroma VHF območju - 2. del: Razred A/B DSC (digitalni selektivni klic)

Pričujoči dokument navaja minimalne zahteve za opremo, ki se uporablja za generiranje, oddajanje in sprejemanje digitalnih selektivnih klicev (DSC) Razreda A ali B, za uporabo na ladjah.
DSC je namenjen za uporabo v srednje frekvenčnih (MF), visoko frekvenčnih (HF) in zelo visoko frekvenčnih (VHF) pasovih pomorskih mobilnih storitev (MMS) v stiski, nuji in pri splošnih komunikacijah. Pričujoči dokument je 2. del večdelnega končnega izdelka, ki zajema zahteve, katere mora izpolnjevati oprema, ki je bodisi integrirana z oddajnikom in/ali sprejemnikom ali oprema, ki je samostojni DSC terminal, in ima naslednji razred DSC:
- razred A: vključuje vse naprave, določene v Dodatku 1 Priporočil M.493-12 [3] ITU-R,  in je v skladu z zahtevami Univerzalnega pomorskega sistema za varnost in stisko na morju (GDMSS) IMO za prevoz MF/HF inštalacij in/ali VHF inštalacij;
- razred B: določa minimalne možnosti izrabe opreme na ladjah, za katero ni potrebno uporabljati opremo razreda A, in je v skladu z minimalnimi zahtevami GMDSS IMO za prevoz MF in/ali VHF inštalacij. Ta oprema mora zagotoviti:
- možnosti za alarmiranje, potrditev in posredovanje v primeru stiske;
- klicanje in potrditev za splošne namene komunikacije; in
- klicanje in povezavo s pol-avtomatskimi/avtomatskimi storitvami, kot je določeno v Priporočilu M.493-12 [3] ITU-R, Dodatku 2, Klavzuli 3.
Te zahteve zajemajo pomembne določbe radijskih predpisov [2] ITU in priporočil ITU-R, Mednarodne konvencije o varstvu človeškega življenja na morju (SOLAS) ter pomembne sklepe Mednarodne pomorske organizacije (IMO).

General Information

• Status: Published
• Public Enquiry End Date: 31-Mar-2009
• Publication Date: 08-Mar-2010
• ICS: 33.060.20 - Receiving and transmitting equipment
• ICS: 33.100.01 - Electromagnetic compatibility in general
• ICS: 47.020.70 - Navigation and control equipment
• Technical Committee: MOC - Mobile Communications
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 24-Feb-2010
• Due Date: 01-May-2010
• Completion Date: 09-Mar-2010
• Ref Project: ETSI EN 300 338-2 V1.3.1 (2010-02) - Electromagnetic compatibility and Radio spectrum Matters (ERM); 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/B DSC

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN 300 338-2 V1.3.1:2010
01-april-2010
(OHNWURPDJQHWQD]GUXåOMLYRVWLQ]DGHYHY]YH]L]UDGLMVNLPVSHNWURP(50
7HKQLþQHNDUDNWHULVWLNHLQPHULOQHPHWRGH]DQDSUDYHNLJHQHULUDMRRGGDMDMRLQ
VSUHMHPDMRGLJLWDOQLVHOHNWLYQLNOLF'6&YSRPRUVNLPRELOQLVWRULWYLNLREUDWXMHY
0)0)+)R]LURPD9+)REPRþMXGHO5D]UHG$%'6&GLJLWDOQLVHOHNWLYQLNOLF
Electromagnetic compatibility and Radio spectrum Matters (ERM) - 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/B DSC
Ta slovenski standard je istoveten z: EN 300 338-2 Version 1.3.1
ICS:
33.060.20 Sprejemna in oddajna Receiving and transmitting
oprema equipment
33.100.01 Elektromagnetna združljivost Electromagnetic compatibility
na splošno in general
47.020.70 Navigacijska in krmilna Navigation and control
oprema equipment
SIST EN 300 338-2 V1.3.1:2010 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 300 338-2 V1.3.1:2010

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SIST EN 300 338-2 V1.3.1:2010

ETSI EN 300 338-2 V1.3.1 (2010-02)
European Standard (Telecommunications series)

Electromagnetic compatibility
and Radio spectrum Matters (ERM);
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/B DSC

---------------------- Page: 3 ----------------------

SIST EN 300 338-2 V1.3.1:2010
 2 ETSI EN 300 338-2 V1.3.1 (2010-02)



Reference
REN/ERM-TG26-066-2
Keywords
DSC, GMDSS, maritime, radio
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE

Tel.: [phone]  Fax: [phone]

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
Individual copies of the present document can be downloaded from:
http://www.etsi.org
The present document may be made available in more than one electronic version or in print. In any case of existing or
perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF).
In case of dispute, the reference shall be the printing on ETSI printers of the PDF version kept on a specific network drive
within ETSI Secretariat.
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
http://portal.etsi.org/tb/status/status.asp
If you find errors in the present document, please send your comment to one of the following services:
http://portal.etsi.org/chaircor/ETSI_support.asp
Copyright Notification
No part may be reproduced except as authorized by written permission.
The copyright and the foregoing restriction extend to reproduction in all media.

© European Telecommunications Standards Institute 2010.
All rights reserved.

TM TM TM TM
DECT , PLUGTESTS , UMTS , TIPHON , the TIPHON logo and the ETSI logo are Trade Marks of ETSI registered
for the benefit of its Members.
TM
3GPP is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners.
LTE™ is a Trade Mark of ETSI currently being registered
for the benefit of its Members and of the 3GPP Organizational Partners.
GSM® and the GSM logo are Trade Marks registered and owned by the GSM Association.
ETSI

---------------------- Page: 4 ----------------------

SIST EN 300 338-2 V1.3.1:2010
 3 ETSI EN 300 338-2 V1.3.1 (2010-02)
Contents
Intellectual Property Rights . 6
Foreword . 6
1 Scope . 7
2 References . 7
2.1 Normative references . 8
2.2 Informative references . 8
3 Definitions and abbreviations . 8
3.1 Definitions . 8
3.2 Abbreviations . 10
4 Controls and Indicators in Class A/B 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/B DSC Equipment . 11
6.1 Introduction . 11
6.2 Non-automated features . 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 . 18
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 . 21
6.4.9 Determining Subsequent communications . 21
6.4.10 Automated tuning . 21
6.4.11 Cancelling the Distress Alert . 21
6.4.11.1 Examples of cancel-distress displays on VHF equipment. 23
6.4.12 Acknowledgments . 23
6.4.13 Termination. 23
6.4.14 Warnings . 23
6.5 Receiving distress automated procedure . 24
6.5.1 Procedure . 24
6.5.2 Tasks . 26
6.5.3 Display . 26
6.5.3.1 Examples of received distress procedure displays on VHF equipment . 27
6.5.4 Handling received DSC Messages . 28
6.5.5 Alarms . 28
6.5.6 Determining Subsequent communications . 28
6.5.7 Automated tuning . 28
6.5.8 Acknowledgments . 28
6.5.9 Sending Relays and Acknowledgments . 29
ETSI

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SIST EN 300 338-2 V1.3.1:2010
 4 ETSI EN 300 338-2 V1.3.1 (2010-02)
6.5.10 Termination. 29
6.5.11 Warnings . 29
6.6 Sending non distress automated procedure . 29
6.6.1 Procedure . 29
6.6.2 Tasks . 30
6.6.3 Display . 31
6.6.3.1 Examples of sending non distress procedures displays on VHF equipment . 32
6.6.4 Handling received DSC Messages . 32
6.6.5 Alarms . 32
6.6.6 Automated tuning . 32
6.6.7 Delayed Acknowledgements . 33
6.6.8 Termination. 33
6.6.9 Warnings . 33
6.7 Receiving non distress automated procedure . 33
6.7.1 Procedure . 33
6.7.2 Tasks . 35
6.7.3 Display . 35
6.7.3.1 Examples of receiving non distress procedures displays on VHF equipment . 36
6.7.4 Handling received DSC messages . 37
6.7.5 Alarms . 37
6.7.6 Automated tuning . 37
6.7.7 Acknowledgments . 38
6.7.8 Termination. 38
6.7.9 Warnings . 38
6.8 Communications automated procedure . 39
6.8.1 Procedure . 39
6.8.2 Tasks . 39
6.8.3 Display . 39
6.8.4 Handling received DSC Messages . 39
6.8.5 Tuning of the general receiver and transmitter . 39
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 . 42
A.1 Default values . 42
A.2 The default DROBOSE . 43
A.3 Allowable non distress DSC message parameters . 43
Annex B (normative): Radius-Centre point conversion and rounding algorithm . 44
B.1 Radius-centre point conversion . 44
B.2 Rounding . 45
B.3 Special cases for either form of area data entry . 45
Annex C (normative): Automated Non Distress Channel/Frequency Selection Algorithm . 46
C.1 VHF . 46
C.2 HF . 46
Annex D (normative): Alarms . 47
D.1 Alarm specifications . 47
D.2 Alarming with critical errors . 48
D.3 Default alarm sounds . 48
D.4 Other alarm sounds . 49
ETSI

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SIST EN 300 338-2 V1.3.1:2010
 5 ETSI EN 300 338-2 V1.3.1 (2010-02)
Annex E (informative): Bibliography . 50
History . 51

ETSI

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SIST EN 300 338-2 V1.3.1:2010
 6 ETSI EN 300 338-2 V1.3.1 (2010-02)
Intellectual Property Rights
IPRs essential or potentially essential to the present document 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 (http://webapp.etsi.org/IPR/home.asp).
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.
Foreword
This European Standard (Telecommunications series) 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 covering Digital Selective Calling (DSC), as identified
below:
Part 1: "Common requirements";
Part 2: "Class A/B DSC";
Part 3: "Class D DSC";
Part 4: "Class E DSC".
The present document covers the operator interfaces and operating system for Class A/B DSC equipment.

National transposition dates
Date of adoption of this EN: 1 February 2010
Date of latest announcement of this EN (doa): 31 May 2010
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 30 November 2010
Date of withdrawal of any conflicting National Standard (dow): 30 November 2010

ETSI

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SIST EN 300 338-2 V1.3.1:2010
 7 ETSI EN 300 338-2 V1.3.1 (2010-02)
1 Scope
The present document states the minimum requirements for equipment to be used for generation, transmission and
reception of Class A or B 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 ITU-R Recommendation M.493-12 [3] and complies
with the IMO Global Maritime Distress and Safety System (GMDSS) carriage requirements for MF/HF
installations and/or VHF installations;
• Class B: provides minimum facilities for equipment on ships not required to use class A equipment and
complies with the minimum IMO GMDSS carriage requirements for MF and/or VHF installations. This
equipment should provide for:
- alerting, acknowledgement and relay facilities for distress purposes;
- calling and acknowledgement for general communication purposes; and
- calling in connection with semi-automatic/automatic services, as defined in
ITU-R Recommendation M.493-12 [3], annex 2, clause 3.
These requirements include the relevant provisions of the ITU Radio Regulations [2] and ITU-R Recommendations, the
International Convention for the Safety Of Life At Sea (SOLAS) [1], and the relevant resolutions of the International
Maritime Organization (IMO).
2 References
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific.
• For a specific reference, subsequent revisions do not apply.
• Non-specific reference may be made only to a complete document or a part thereof and only in the following
cases:
- if it is accepted that it will be possible to use all future changes of the referenced document for the
purposes of the referring document;
- for informative references.
Referenced documents which are not found to be publicly available in the expected location might be found at
http://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.
ETSI

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SIST EN 300 338-2 V1.3.1:2010
 8 ETSI EN 300 338-2 V1.3.1 (2010-02)
2.1 Normative references
The following referenced documents are indispensable for the application of the present document. For dated
references, only the edition cited applies. For non-specific references, the latest edition of the referenced document
(including any amendments) applies.
[1] "International Convention for the Safety of Life at Sea", 1974.
[2] "ITU Radio Regulations", 2008.
[3] ITU-R Recommendation M.493-12: "Digital selective-calling system for use in the maritime
mobile service".
2.2 Informative references
The following referenced documents are not essential to the use of the present document but they assist the user with
regard to a particular subject area. For non-specific references, the latest version of the referenced document (including
any amendments) applies.
[i.1] IMO Regulation IV/14, regulation X/3, IV/6.6, IMO resolution MSC.97 (73) 14.6.4.
[i.2] ETSI EN 300 338-1: "Electromagnetic compatibility and Radio spectrum Matters (ERM);
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 Definitions and abbreviations
3.1 Definitions
For the purposes of the present document, the terms and definitions given in EN 300 338-1 [i.2] and the following
apply:
acknowledged: automated procedure is said to be 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.
default: value selected or an action taken by the equipment software in the absence of any operator input
ETSI

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SIST EN 300 338-2 V1.3.1:2010
 9 ETSI EN 300 338-2 V1.3.1 (2010-02)
distress DSC message: DSC message or acknowledgement containing the distress information
distress event: unique distress situation identified by two (VHF) or three (MF/HF) parameters of the distress
information; the MMSI of the vessel in distress and the nature of distress and on MF/HF the mode of subsequent
communication
engaged: used to indicate that the equipment is busy handling an automated procedure
factory default: default value that is set by the manufacturer such that the field or behaviour is defined prior to any
operator intervention
general receiver: receiver part of the transceiver used for the reception of all subsequent communications and on HF
the reception of DSC acknowledgements on the duplex DSC channels
NOTE: It is important to distinguish this unit from the watch receiver.
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
NOTE: These symbols are repeated in the DX/RX time diversity pattern.
initial DSC message: DSC message that starts an automated procedure
non distress DSC message: DSC messages or acknowledgments that do not have the format specifier or category of
"distress"
objective: when in reference to a DSC message or automated procedure, the goal or intent of the item
NOTE: Usually this goal or intent is to establish subsequent communications or request information.
on hold: automated procedure which does not have access to the transmitter and general receiver and therefore cannot
engage in subsequent communications and is only able to receive DSC messages on the watch receiver
operator options: any choices the operator can make while the automated procedure is engaged
parallel event handling: background process of handling a received DSC
...

ETSI EN 300 338-2 V1.3.1 (2010-02)
European Standard (Telecommunications series)

Electromagnetic compatibility
and Radio spectrum Matters (ERM);
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/B DSC

---------------------- Page: 1 ----------------------
2 ETSI EN 300 338-2 V1.3.1 (2010-02)



Reference
REN/ERM-TG26-066-2
Keywords
DSC, GMDSS, maritime, radio
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE

Tel.: [phone]  Fax: [phone]

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
Individual copies of the present document can be downloaded from:
http://www.etsi.org
The present document may be made available in more than one electronic version or in print. In any case of existing or
perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF).
In case of dispute, the reference shall be the printing on ETSI printers of the PDF version kept on a specific network drive
within ETSI Secretariat.
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
http://portal.etsi.org/tb/status/status.asp
If you find errors in the present document, please send your comment to one of the following services:
http://portal.etsi.org/chaircor/ETSI_support.asp
Copyright Notification
No part may be reproduced except as authorized by written permission.
The copyright and the foregoing restriction extend to reproduction in all media.

© European Telecommunications Standards Institute 2010.
All rights reserved.

TM TM TM TM
DECT , PLUGTESTS , UMTS , TIPHON , the TIPHON logo and the ETSI logo are Trade Marks of ETSI registered
for the benefit of its Members.
TM
3GPP is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners.
LTE™ is a Trade Mark of ETSI currently being registered
for the benefit of its Members and of the 3GPP Organizational Partners.
GSM® and the GSM logo are Trade Marks registered and owned by the GSM Association.
ETSI

---------------------- Page: 2 ----------------------
3 ETSI EN 300 338-2 V1.3.1 (2010-02)
Contents
Intellectual Property Rights . 6
Foreword . 6
1 Scope . 7
2 References . 7
2.1 Normative references . 8
2.2 Informative references . 8
3 Definitions and abbreviations . 8
3.1 Definitions . 8
3.2 Abbreviations . 10
4 Controls and Indicators in Class A/B 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/B DSC Equipment . 11
6.1 Introduction . 11
6.2 Non-automated features . 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 . 18
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 . 21
6.4.9 Determining Subsequent communications . 21
6.4.10 Automated tuning . 21
6.4.11 Cancelling the Distress Alert . 21
6.4.11.1 Examples of cancel-distress displays on VHF equipment. 23
6.4.12 Acknowledgments . 23
6.4.13 Termination. 23
6.4.14 Warnings . 23
6.5 Receiving distress automated procedure . 24
6.5.1 Procedure . 24
6.5.2 Tasks . 26
6.5.3 Display . 26
6.5.3.1 Examples of received distress procedure displays on VHF equipment . 27
6.5.4 Handling received DSC Messages . 28
6.5.5 Alarms . 28
6.5.6 Determining Subsequent communications . 28
6.5.7 Automated tuning . 28
6.5.8 Acknowledgments . 28
6.5.9 Sending Relays and Acknowledgments . 29
ETSI

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4 ETSI EN 300 338-2 V1.3.1 (2010-02)
6.5.10 Termination. 29
6.5.11 Warnings . 29
6.6 Sending non distress automated procedure . 29
6.6.1 Procedure . 29
6.6.2 Tasks . 30
6.6.3 Display . 31
6.6.3.1 Examples of sending non distress procedures displays on VHF equipment . 32
6.6.4 Handling received DSC Messages . 32
6.6.5 Alarms . 32
6.6.6 Automated tuning . 32
6.6.7 Delayed Acknowledgements . 33
6.6.8 Termination. 33
6.6.9 Warnings . 33
6.7 Receiving non distress automated procedure . 33
6.7.1 Procedure . 33
6.7.2 Tasks . 35
6.7.3 Display . 35
6.7.3.1 Examples of receiving non distress procedures displays on VHF equipment . 36
6.7.4 Handling received DSC messages . 37
6.7.5 Alarms . 37
6.7.6 Automated tuning . 37
6.7.7 Acknowledgments . 38
6.7.8 Termination. 38
6.7.9 Warnings . 38
6.8 Communications automated procedure . 39
6.8.1 Procedure . 39
6.8.2 Tasks . 39
6.8.3 Display . 39
6.8.4 Handling received DSC Messages . 39
6.8.5 Tuning of the general receiver and transmitter . 39
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 . 42
A.1 Default values . 42
A.2 The default DROBOSE . 43
A.3 Allowable non distress DSC message parameters . 43
Annex B (normative): Radius-Centre point conversion and rounding algorithm . 44
B.1 Radius-centre point conversion . 44
B.2 Rounding . 45
B.3 Special cases for either form of area data entry . 45
Annex C (normative): Automated Non Distress Channel/Frequency Selection Algorithm . 46
C.1 VHF . 46
C.2 HF . 46
Annex D (normative): Alarms . 47
D.1 Alarm specifications . 47
D.2 Alarming with critical errors . 48
D.3 Default alarm sounds . 48
D.4 Other alarm sounds . 49
ETSI

---------------------- Page: 4 ----------------------
5 ETSI EN 300 338-2 V1.3.1 (2010-02)
Annex E (informative): Bibliography . 50
History . 51

ETSI

---------------------- Page: 5 ----------------------
6 ETSI EN 300 338-2 V1.3.1 (2010-02)
Intellectual Property Rights
IPRs essential or potentially essential to the present document 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 (http://webapp.etsi.org/IPR/home.asp).
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.
Foreword
This European Standard (Telecommunications series) 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 covering Digital Selective Calling (DSC), as identified
below:
Part 1: "Common requirements";
Part 2: "Class A/B DSC";
Part 3: "Class D DSC";
Part 4: "Class E DSC".
The present document covers the operator interfaces and operating system for Class A/B DSC equipment.

National transposition dates
Date of adoption of this EN: 1 February 2010
Date of latest announcement of this EN (doa): 31 May 2010
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 30 November 2010
Date of withdrawal of any conflicting National Standard (dow): 30 November 2010

ETSI

---------------------- Page: 6 ----------------------
7 ETSI EN 300 338-2 V1.3.1 (2010-02)
1 Scope
The present document states the minimum requirements for equipment to be used for generation, transmission and
reception of Class A or B 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 ITU-R Recommendation M.493-12 [3] and complies
with the IMO Global Maritime Distress and Safety System (GMDSS) carriage requirements for MF/HF
installations and/or VHF installations;
• Class B: provides minimum facilities for equipment on ships not required to use class A equipment and
complies with the minimum IMO GMDSS carriage requirements for MF and/or VHF installations. This
equipment should provide for:
- alerting, acknowledgement and relay facilities for distress purposes;
- calling and acknowledgement for general communication purposes; and
- calling in connection with semi-automatic/automatic services, as defined in
ITU-R Recommendation M.493-12 [3], annex 2, clause 3.
These requirements include the relevant provisions of the ITU Radio Regulations [2] and ITU-R Recommendations, the
International Convention for the Safety Of Life At Sea (SOLAS) [1], and the relevant resolutions of the International
Maritime Organization (IMO).
2 References
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific.
• For a specific reference, subsequent revisions do not apply.
• Non-specific reference may be made only to a complete document or a part thereof and only in the following
cases:
- if it is accepted that it will be possible to use all future changes of the referenced document for the
purposes of the referring document;
- for informative references.
Referenced documents which are not found to be publicly available in the expected location might be found at
http://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.
ETSI

---------------------- Page: 7 ----------------------
8 ETSI EN 300 338-2 V1.3.1 (2010-02)
2.1 Normative references
The following referenced documents are indispensable for the application of the present document. For dated
references, only the edition cited applies. For non-specific references, the latest edition of the referenced document
(including any amendments) applies.
[1] "International Convention for the Safety of Life at Sea", 1974.
[2] "ITU Radio Regulations", 2008.
[3] ITU-R Recommendation M.493-12: "Digital selective-calling system for use in the maritime
mobile service".
2.2 Informative references
The following referenced documents are not essential to the use of the present document but they assist the user with
regard to a particular subject area. For non-specific references, the latest version of the referenced document (including
any amendments) applies.
[i.1] IMO Regulation IV/14, regulation X/3, IV/6.6, IMO resolution MSC.97 (73) 14.6.4.
[i.2] ETSI EN 300 338-1: "Electromagnetic compatibility and Radio spectrum Matters (ERM);
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 Definitions and abbreviations
3.1 Definitions
For the purposes of the present document, the terms and definitions given in EN 300 338-1 [i.2] and the following
apply:
acknowledged: automated procedure is said to be 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.
default: value selected or an action taken by the equipment software in the absence of any operator input
ETSI

---------------------- Page: 8 ----------------------
9 ETSI EN 300 338-2 V1.3.1 (2010-02)
distress DSC message: DSC message or acknowledgement containing the distress information
distress event: unique distress situation identified by two (VHF) or three (MF/HF) parameters of the distress
information; the MMSI of the vessel in distress and the nature of distress and on MF/HF the mode of subsequent
communication
engaged: used to indicate that the equipment is busy handling an automated procedure
factory default: default value that is set by the manufacturer such that the field or behaviour is defined prior to any
operator intervention
general receiver: receiver part of the transceiver used for the reception of all subsequent communications and on HF
the reception of DSC acknowledgements on the duplex DSC channels
NOTE: It is important to distinguish this unit from the watch receiver.
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
NOTE: These symbols are repeated in the DX/RX time diversity pattern.
initial DSC message: DSC message that starts an automated procedure
non distress DSC message: DSC messages or acknowledgments that do not have the format specifier or category of
"distress"
objective: when in reference to a DSC message or automated procedure, the goal or intent of the item
NOTE: Usually this goal or intent is to establish subsequent communications or request information.
on hold: automated procedure which does not have access to the transmitter and general receiver and therefore cannot
engage in subsequent communications and is only able to receive DSC messages on the watch receiver
operator options: any choices the operator can make while the automated procedure is engaged
parallel event handling: background process of handling a received DSC message that is not pertinent to the active
automated procedure
pertinent to the automated procedure: expression used primarily with reference to DSC messages to indicate that the
message has something to do with the procedure and is therefore "handled" by the procedure
NOTE: A DSC message is pertinent to an automated procedure if the set of information characters in the DSC
message has the correct values.
pertinent to the station: any DSC message that would start an automated procedure if the transceiver were in standby
self-terminating alarm: short alarm that stops by itself without operator intervention
NOTE: The purpose of this alarm is to inform the operator that a DSC message is received but it does not require
his immediate attention.
symbol (as part of the DSC sentence): term used to describe the 7 binary bits of a 10 bit DSC word that have the
information content
toggle (between automated procedures): ability to make one automated procedure active assuring that all other
procedures go on hold
top level: top level means that items, buttons, or functions are present and visible without requiring any action by the
operator (such as scrolling, opening up menus, or removing any obscuring covers, etc.)
two-tone alarm: alarm consisting of a repetition of the 2 200 Hz frequency for 250 ms followed by a 1 300 Hz
frequency for 250 ms
NOTE: This alarm is used for the initiation of the received distress DSC automated procedure.
ETSI

---------------------- Page: 9 ----------------------
10 ETSI EN 300 338-2 V1.3.1 (2010-02)
urgency alarm: al
...

Final draft ETSI EN 300 338-2 V1.3.1 (2009-12)
European Standard (Telecommunications series)

Electromagnetic compatibility
and Radio spectrum Matters (ERM);
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/B DSC

---------------------- Page: 1 ----------------------
2 Final draft ETSI EN 300 338-2 V1.3.1 (2009-12)



Reference
REN/ERM-TG26-066-2
Keywords
DSC, GMDSS, maritime, radio
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE

Tel.: [phone]  Fax: [phone]

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
Individual copies of the present document can be downloaded from:
http://www.etsi.org
The present document may be made available in more than one electronic version or in print. In any case of existing or
perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF).
In case of dispute, the reference shall be the printing on ETSI printers of the PDF version kept on a specific network drive
within ETSI Secretariat.
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
http://portal.etsi.org/tb/status/status.asp
If you find errors in the present document, please send your comment to one of the following services:
http://portal.etsi.org/chaircor/ETSI_support.asp
Copyright Notification
No part may be reproduced except as authorized by written permission.
The copyright and the foregoing restriction extend to reproduction in all media.

© European Telecommunications Standards Institute 2009.
All rights reserved.

TM TM TM TM
DECT , PLUGTESTS , UMTS , TIPHON , the TIPHON logo and the ETSI logo are Trade Marks of ETSI registered
for the benefit of its Members.
TM
3GPP is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners.
LTE™ is a Trade Mark of ETSI currently being registered
for the benefit of its Members and of the 3GPP Organizational Partners.
GSM® and the GSM logo are Trade Marks registered and owned by the GSM Association.
ETSI

---------------------- Page: 2 ----------------------
3 Final draft ETSI EN 300 338-2 V1.3.1 (2009-12)
Contents
Intellectual Property Rights . 6
Foreword . 6
1 Scope . 7
2 References . 7
2.1 Normative references . 8
2.2 Informative references . 8
3 Definitions and abbreviations . 8
3.1 Definitions . 8
3.2 Abbreviations . 10
4 Controls and Indicators in Class A/B 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/B DSC Equipment . 11
6.1 Introduction . 11
6.2 Non-automated features . 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 . 18
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 . 21
6.4.9 Determining Subsequent communications . 21
6.4.10 Automated tuning . 21
6.4.11 Cancelling the Distress Alert . 21
6.4.11.1 Examples of cancel-distress displays on VHF equipment. 23
6.4.12 Acknowledgments . 23
6.4.13 Termination. 23
6.4.14 Warnings . 23
6.5 Receiving distress automated procedure . 24
6.5.1 Procedure . 24
6.5.2 Tasks . 26
6.5.3 Display . 26
6.5.3.1 Examples of received distress procedure displays on VHF equipment . 27
6.5.4 Handling received DSC Messages . 28
6.5.5 Alarms . 28
6.5.6 Determining Subsequent communications . 28
6.5.7 Automated tuning . 28
6.5.8 Acknowledgments . 28
6.5.9 Sending Relays and Acknowledgments . 29
ETSI

---------------------- Page: 3 ----------------------
4 Final draft ETSI EN 300 338-2 V1.3.1 (2009-12)
6.5.10 Termination. 29
6.5.11 Warnings . 29
6.6 Sending non distress automated procedure . 29
6.6.1 Procedure . 29
6.6.2 Tasks . 30
6.6.3 Display . 31
6.6.3.1 Examples of sending non distress procedures displays on VHF equipment . 32
6.6.4 Handling received DSC Messages . 32
6.6.5 Alarms . 32
6.6.6 Automated tuning . 32
6.6.7 Delayed Acknowledgements . 33
6.6.8 Termination. 33
6.6.9 Warnings . 33
6.7 Receiving non distress automated procedure . 33
6.7.1 Procedure . 33
6.7.2 Tasks . 35
6.7.3 Display . 35
6.7.3.1 Examples of receiving non distress procedures displays on VHF equipment . 36
6.7.4 Handling received DSC messages . 37
6.7.5 Alarms . 37
6.7.6 Automated tuning . 37
6.7.7 Acknowledgments . 38
6.7.8 Termination. 38
6.7.9 Warnings . 38
6.8 Communications automated procedure . 39
6.8.1 Procedure . 39
6.8.2 Tasks . 39
6.8.3 Display . 39
6.8.4 Handling received DSC Messages . 39
6.8.5 Tuning of the general receiver and transmitter . 39
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 . 42
A.1 Default values . 42
A.2 The default DROBOSE . 43
A.3 Allowable non distress DSC message parameters . 43
Annex B (normative): Radius-Centre point conversion and rounding algorithm . 44
B.1 Radius-centre point conversion . 44
B.2 Rounding . 45
B.3 Special cases for either form of area data entry . 45
Annex C (normative): Automated Non Distress Channel/Frequency Selection Algorithm . 46
C.1 VHF . 46
C.2 HF . 46
Annex D (normative): Alarms . 47
D.1 Alarm specifications . 47
D.2 Alarming with critical errors . 48
D.3 Default alarm sounds . 48
D.4 Other alarm sounds . 49
ETSI

---------------------- Page: 4 ----------------------
5 Final draft ETSI EN 300 338-2 V1.3.1 (2009-12)
Annex E (informative): Bibliography . 50
History . 51

ETSI

---------------------- Page: 5 ----------------------
6 Final draft ETSI EN 300 338-2 V1.3.1 (2009-12)
Intellectual Property Rights
IPRs essential or potentially essential to the present document 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 (http://webapp.etsi.org/IPR/home.asp).
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.
Foreword
This European Standard (Telecommunications series) 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 Two-step Approval Procedure.
The present document is part 2 of a multi-part deliverable covering Digital Selective Calling (DSC), as identified
below:
Part 1: "Common requirements";
Part 2: "Class A/B DSC";
Part 3: "Class D DSC";
Part 4: "Class E DSC".
The present document covers the operator interfaces and operating system for Class A/B 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): 6 months after doa

ETSI

---------------------- Page: 6 ----------------------
7 Final draft ETSI EN 300 338-2 V1.3.1 (2009-12)
1 Scope
The present document states the minimum requirements for equipment to be used for generation, transmission and
reception of Class A or B 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 ITU-R Recommendation M.493-12 [3] and complies
with the IMO Global Maritime Distress and Safety System (GMDSS) carriage requirements for MF/HF
installations and/or VHF installations;
• Class B: provides minimum facilities for equipment on ships not required to use class A equipment and
complies with the minimum IMO GMDSS carriage requirements for MF and/or VHF installations. This
equipment should provide for:
- alerting, acknowledgement and relay facilities for distress purposes;
- calling and acknowledgement for general communication purposes; and
- calling in connection with semi-automatic/automatic services, as defined in
ITU-R Recommendation M.493-12 [3], annex 2, clause 3.
These requirements include the relevant provisions of the ITU Radio Regulations [2] and ITU-R Recommendations, the
International Convention for the Safety Of Life At Sea (SOLAS) [1], and the relevant resolutions of the International
Maritime Organization (IMO).
2 References
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific.
• For a specific reference, subsequent revisions do not apply.
• Non-specific reference may be made only to a complete document or a part thereof and only in the following
cases:
- if it is accepted that it will be possible to use all future changes of the referenced document for the
purposes of the referring document;
- for informative references.
Referenced documents which are not found to be publicly available in the expected location might be found at
http://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.
ETSI

---------------------- Page: 7 ----------------------
8 Final draft ETSI EN 300 338-2 V1.3.1 (2009-12)
2.1 Normative references
The following referenced documents are indispensable for the application of the present document. For dated
references, only the edition cited applies. For non-specific references, the latest edition of the referenced document
(including any amendments) applies.
[1] "International Convention for the Safety of Life at Sea", 1974.
[2] "ITU Radio Regulations", 2008.
[3] ITU-R Recommendation M.493-12: "Digital selective-calling system for use in the maritime
mobile service".
2.2 Informative references
The following referenced documents are not essential to the use of the present document but they assist the user with
regard to a particular subject area. For non-specific references, the latest version of the referenced document (including
any amendments) applies.
[i.1] IMO Regulation IV/14, regulation X/3, IV/6.6, IMO resolution MSC.97 (73) 14.6.4.
[i.2] ETSI EN 300 338-1: "Electromagnetic compatibility and Radio spectrum Matters (ERM);
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 Definitions and abbreviations
3.1 Definitions
For the purposes of the present document, the terms and definitions given in EN 300 338-1 [i.2] and the following
apply:
acknowledged: automated procedure is said to be 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.
default: value selected or an action taken by the equipment software in the absence of any operator input
ETSI

---------------------- Page: 8 ----------------------
9 Final draft ETSI EN 300 338-2 V1.3.1 (2009-12)
distress DSC message: DSC message or acknowledgement containing the distress information
distress event: unique distress situation identified by two (VHF) or three (MF/HF) parameters of the distress
information; the MMSI of the vessel in distress and the nature of distress and on MF/HF the mode of subsequent
communication
engaged: used to indicate that the equipment is busy handling an automated procedure
factory default: default value that is set by the manufacturer such that the field or behaviour is defined prior to any
operator intervention
general receiver: receiver part of the transceiver used for the reception of all subsequent communications and on HF
the reception of DSC acknowledgements on the duplex DSC channels
NOTE: It is important to distinguish this unit from the watch receiver.
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
NOTE: These symbols are repeated in the DX/RX time diversity pattern.
initial DSC message: DSC message that starts an automated procedure
non distress DSC message: DSC messages or acknowledgments that do not have the format specifier or category of
"distress"
objective: when in reference to a DSC message or automated procedure, the goal or intent of the item
NOTE: Usually this goal or intent is to establish subsequent communications or request information.
on hold: automated procedure which does not have access to the transmitter and general receiver and therefore cannot
engage in subsequent communications and is only able to receive DSC messages on the watch receiver
operator options: any choices the operator can make while the automated procedure is engaged
parallel event handling: background process of handling a received DSC message that is not pertinent to the active
automated procedure
pertinent to the automated procedure: expression used primarily with reference to DSC messages to indicate that the
message has something to do with the procedure and is therefore "handled" by the procedure
NOTE: A DSC message is pertinent to an automated procedure if the set of information characters in the DSC
message has the correct values.
pertinent to the station: any DSC message that would start an automated procedure if the transceiver were in standby
self-terminating alarm: short alarm that stops by itself without operator intervention
NOTE: The purpose of this alarm is to inform the operator that a DSC message is received but it does not require
his immediate attention.
symbol (as part of the DSC sentence): term used to describe the 7 binary bits of a 10 bit DSC word that have the
information content
toggle (between automated procedures): ability to make one automated procedure active assuring that all other
procedures go on hold
top level: top level means that items, buttons, or functions are present and visible without requiring any action by the
operator (such as scrolling, opening up menus, or removing any obscuring covers, etc.)
two-tone alarm: alarm consisting of a repetition of the 2 200 Hz frequency for 250 ms followed by a 1 300 Hz
frequency for 250 ms
NOTE: This alarm is used
...

Draft ETSI EN 300 338-2 V1.3.1 (2008-12)
European Standard (Telecommunications series)

Electromagnetic compatibility
and Radio spectrum Matters (ERM);
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/B DSC

---------------------- Page: 1 ----------------------
2 Draft ETSI EN 300 338-2 V1.3.1 (2008-12)



Reference
REN/ERM-TG26-066-2
Keywords
maritime, radio, GMDSS, DSC
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE

Tel.: [phone]  Fax: [phone]

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
Individual copies of the present document can be downloaded from:
http://www.etsi.org
The present document may be made available in more than one electronic version or in print. In any case of existing or
perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF).
In case of dispute, the reference shall be the printing on ETSI printers of the PDF version kept on a specific network drive
within ETSI Secretariat.
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
http://portal.etsi.org/tb/status/status.asp
If you find errors in the present document, please send your comment to one of the following services:
http://portal.etsi.org/chaircor/ETSI_support.asp
Copyright Notification
No part may be reproduced except as authorized by written permission.
The copyright and the foregoing restriction extend to reproduction in all media.

© European Telecommunications Standards Institute 2008.
All rights reserved.

TM TM TM TM
DECT , PLUGTESTS , UMTS , TIPHON , the TIPHON logo and the ETSI logo are Trade Marks of ETSI registered
for the benefit of its Members.
TM
3GPP is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners.
ETSI

---------------------- Page: 2 ----------------------
3 Draft ETSI EN 300 338-2 V1.3.1 (2008-12)
Contents
Intellectual Property Rights . 6
Foreword . 6
1 Scope . 7
2 References . 7
2.1 Normative references . 8
2.2 Informative references . 8
3 Definitions and abbreviations . 8
3.1 Definitions . 8
3.2 Abbreviations . 10
4 Controls and Indicators in Class A/B DSC Equipment . 11
4.1 Visual indication . 11
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/B DSC Equipment . 12
6.1 Introduction . 12
6.2 Non-automated features . 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
6.4.3.1 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 . 19
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 . 20
6.4.10 Automated tuning . 20
6.4.11 Cancelling the Distress Alert . 21
6.4.11.1 Examples of cancel-distress displays on VHF equipment. 22
6.4.12 Acknowledgments . 22
6.4.13 Termination. 22
6.4.14 Warnings . 22
6.5 Receiving distress automated procedure . 23
6.5.1 Procedure . 23
6.5.2 Tasks . 25
6.5.3 Display . 25
6.5.3.1 Examples of received distress procedure displays on VHF equipment . 26
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 . 27
6.5.9 Sending Relays and Acknowledgments . 28
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4 Draft ETSI EN 300 338-2 V1.3.1 (2008-12)
6.5.10 Termination. 28
6.5.11 Warnings . 28
6.6 Sending non distress automated procedure . 28
6.6.1 Procedure . 28
6.6.2 Tasks . 29
6.6.3 Display . 30
6.6.3.1 Examples of sending non distress procedures displays on VHF equipment . 31
6.6.4 Handling received DSC Messages . 31
6.6.5 Alarms . 31
6.6.6 Automated tuning . 31
6.6.7 Delayed Acknowledgements . 32
6.6.8 Termination. 32
6.6.9 Warnings . 32
6.7 Receiving non distress automated procedure . 32
6.7.1 Procedure . 32
6.7.2 Tasks . 33
6.7.3 Display . 34
6.7.3.1 Examples of receiving non distress procedures displays on VHF equipment . 35
6.7.4 Handling received DSC messages . 35
6.7.5 Alarms . 35
6.7.6 Automated tuning . 36
6.7.7 Acknowledgments . 36
6.7.8 Termination. 36
6.7.9 Warnings . 37
6.8 Communications automated procedure . 37
6.8.1 Procedure . 37
6.8.2 Tasks . 37
6.8.3 Display . 37
6.8.4 Handling received DSC Messages . 37
6.8.5 Tuning of the general receiver and transmitter . 38
6.8.6 Termination. 38
6.9 Multiple automated procedures and parallel event handling . 38
6.9.1 Procedure . 38
6.9.2 Tasks . 38
6.9.3 Examples of multiple procedure screens . 39
Annex A (normative): DSC Message Composition . 41
A.1 Default values . 41
A.2 The default DROBOSE . 42
A.3 Allowable non distress DSC message parameters . 42
Annex B (normative): Radius-Centre point conversion and rounding algorithm . 43
B.1 Radius-centre point conversion . 43
B.2 Rounding . 44
B.3 Special cases for either form of area data entry . 44
Annex C (normative): Automated Non Distress Channel/Frequency Selection Algorithm . 45
C.1 VHF . 45
C.2 HF . 45
Annex D (normative): Alarms . 46
D.1 Alarm specifications . 46
D.2 Alarming with critical errors . 47
D.3 Default alarm sounds . 48
D.4 Other alarm sounds . 48
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5 Draft ETSI EN 300 338-2 V1.3.1 (2008-12)
Annex E (informative): Bibliography . 49
History . 50

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6 Draft ETSI EN 300 338-2 V1.3.1 (2008-12)
Intellectual Property Rights
IPRs essential or potentially essential to the present document 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 (http://webapp.etsi.org/IPR/home.asp).
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.
Foreword
This European Standard (Telecommunications series) has been produced by ETSI Technical Committee
Electromagnetic compatibility and Radio spectrum Matters (ERM), and is now submitted f for the Public Enquiry phase
of the ETSI standards Two-step 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.2].

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): 6 months after doa

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7 Draft ETSI EN 300 338-2 V1.3.1 (2008-12)
1 Scope
The present document states the minimum requirements for equipment to be used for generation, transmission and
reception of Class A or B Digital Selective Calling (DSC) for use on board ships.
DSC may be used in the Medium Frequency (MF), High Frequency (HF) and Very High Frequency (VHF) Maritime
Mobile Service (MMS), for both distress, safety and general communications.
The present document is part 2 of a multi-part standard 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 ITU-R Recommendation M.493-12 [3] and complies
with the IMO Global Maritime Distress and Safety System (GMDSS) carriage requirements for MF/HF
installations and/or VHF installations;
• Class B - provides minimum facilities for equipment on ships not required to use class A equipment and
complies with the minimum IMO GMDSS carriage requirements for MF and/or VHF installations. This
equipment should provide for:
- alerting, acknowledgement and relay facilities for distress purposes;
- calling and acknowledgement for general communication purposes; and
- calling in connection with semi-automatic/automatic services, as defined in
ITU-R Recommendation M.493-12 [3], annex 2, clause 3.
These requirements include the relevant provisions of the ITU Radio Regulations [2] and ITU-R Recommendations, the
International Convention for the Safety Of Life At Sea (SOLAS) [1], and the relevant resolutions of the International
Maritime Organization (IMO).
2 References
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific.
• For a specific reference, subsequent revisions do not apply.
• Non-specific reference may be made only to a complete document or a part thereof and only in the following
cases:
- if it is accepted that it will be possible to use all future changes of the referenced document for the
purposes of the referring document;
- for informative references.
Referenced documents which are not found to be publicly available in the expected location might be found at
http://docbox.etsi.org/Reference.
For online referenced documents, information sufficient to identify and locate the source shall be provided. Preferably,
the primary source of the referenced document should be cited, in order to ensure traceability. Furthermore, the
reference should, as far as possible, remain valid for the expected life of the document. The reference shall include the
method of access to the referenced document and the full network address, with the same punctuation and use of upper
case and lower case letters.
NOTE: While any hyperlinks included in this clause were valid at the time of publication ETSI cannot guarantee
their long term validity.
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8 Draft ETSI EN 300 338-2 V1.3.1 (2008-12)
2.1 Normative references
The following referenced documents are indispensable for the application of the present document. For dated
references, only the edition cited applies. For non-specific references, the latest edition of the referenced document
(including any amendments) applies.
[1] International Convention for the Safety of Life at Sea (1974) as amended.
[2] ITU Radio Regulations (2008).
[3] ITU-R Recommendation M.493-12: "Digital selective-calling system for use in the maritime
mobile service".
2.2 Informative references
The following referenced documents are not essential to the use of the present document but they assist the user with
regard to a particular subject area. For non-specific references, the latest version of the referenced document (including
any amendments) applies.
[i.1] IMO Regulation IV/14, regulation X/3, IV/6.6, IMO resolution MSC.97 (73) 14.6.4.
[i.2] ETSI EN 300 338-1: "Electromagnetic compatibility and Radio spectrum Matters (ERM);
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 Definitions and abbreviations
3.1 Definitions
For the purposes of the present document, the following terms and definitions apply:
acknowledged: automated procedure it indicates that 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.
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9 Draft ETSI EN 300 338-2 V1.3.1 (2008-12)
critical errors: set of information characters obtained from one or more received DSC messages is considered to have
critical errors if the automated procedure needs information characters from that set in order to proceed or perform any
task, but the required information characters are in error
EXAMPLE: An acknowledgement cannot be composed to an individual DSC message that has errors in the
senders MMSI).
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 alert attempt: set of distress alerts sent by a vessel when in distress
NOTE: A distress alert DSC message by itself is never intentionally sent by a vessel in distress. For example, the
single frequency distress alert attempt consists of five consecutive distress alerts with no break in between
each distress alert.
distress DSC message: DSC message or acknowledgement containing the distress information
distress event: unique distress situation identified by two (VHF) or three (MF/HF) parameters of the distress
information; the MMSI of the vessel in distress and the nature of distress and on MF/HF the mode of subsequent
communication
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
engaged: used to indicate that the equipment is busy handling an automated procedure
factory default: default value that is set by the manufacturer such that the field or behaviour is defined prior to any
operator intervention
general receiver: receiver part of the transceiver used for the reception of all subsequent communications and on HF
the reception of DSC acknowledgements on the duplex DSC channels
NOTE: It is important to distinguish this unit from the watch receiver.
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
NOTE: These symbols are repeated in the DX/RX time diversity pattern.
initial DSC message: DSC message that starts an automated procedure
non distress DSC message: DSC messages or acknowledgments that do not have the format specifier or category of
"distress"
objective: when in reference to a DSC message or automated procedure, the goal or intent of the item
NOTE: Usually this goal or intent is to establish subsequent communications or request information.
on hold: automated procedure which does not have access to the transmitter and general receiver and therefore cannot
engage in subsequent communications and is only able to receive DSC messages on the watch receiver
operator options: any choices the operator can make while the automated procedure is engaged
parallel event handling: background process of handling a received DSC message that is not pertinent to the active
automated procedure
pertinent to the automated procedure: expression used primarily with reference to DSC messages to indicate that the
message has something to do with the procedure and is therefore "handled" by the procedure
NOTE: A DSC message is pertinent to an automated
...