IEC 62923-1:2018

IEC 62923-1 ®
Edition 1.0 2018-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Maritime navigation and radiocommunication equipment and systems – Bridge
alert management –
Part 1: Operational and performance requirements, methods of testing and
required test results
Matériels et systèmes de navigation et de radiocommunication maritimes –
Gestion des alertes a la passerelle –
Partie 1: Exigences d'exploitation et de fonctionnement, méthodes d'essai et
résultats d'essai exigés
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IEC 62923-1 ®
Edition 1.0 2018-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Maritime navigation and radiocommunication equipment and systems – Bridge

alert management –
Part 1: Operational and performance requirements, methods of testing and

required test results
Matériels et systèmes de navigation et de radiocommunication maritimes –

Gestion des alertes a la passerelle –

Partie 1: Exigences d'exploitation et de fonctionnement, méthodes d'essai et

résultats d'essai exigés
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 47.020.70 ISBN 978-2-8322-5993-1

– 2 – IEC 62923-1:2018  IEC 2018
CONTENTS
FOREWORD . 7
INTRODUCTION . 9
1 Scope . 10
2 Normative references . 10
3 Terms, definitions and abbreviated terms . 11
3.1 Terms and definitions. 11
3.2 Abbreviated terms . 16
4 Description . 17
4.1 Purpose . 17
4.2 EUT function types . 17
4.3 Application . 18
4.4 Implementation of BAM interfaces . 18
4.5 Clusters . 19
5 Test methods . 20
5.1 Subject of tests . 20
5.2 Test set-ups . 20
5.3 General requirements . 20
5.4 Configuration for testing . 21
6 Module A – Presentation and handling of alerts on the bridge . 21
6.1 General . 21
6.1.1 Provisions. 21
6.1.2 Number of alerts for one situation . 21
6.1.3 Alert presentation at several locations . 22
6.1.4 Central alert management HMI . 22
6.2 Priorities classification and categories . 23
6.2.1 Applicability . 23
6.2.2 Requirement . 23
6.2.3 Methods of test and required results . 25
6.3 Presentation and state of alerts . 25
6.3.1 Applicability . 25
6.3.2 General . 25
6.3.3 Emergency alarms . 29
6.3.4 Alarms . 29
6.3.5 Warnings . 34
6.3.6 Cautions . 39
6.3.7 Alert escalation . 39
6.4 Presentation of alerts on the bridge . 41
6.4.1 Applicability . 41
6.4.2 General requirements . 41
6.4.3 Aids for decision making . 45
6.4.4 Audible annunciation . 45
6.4.5 Display of icons . 48
6.4.6 Functionality to help reduce the number of high-priority alerts . 48
6.5 Systems failures, redundancies, back-up and fallback arrangements . 49
6.5.1 Applicability . 49
6.5.2 Requirement . 49

6.5.3 Methods of test and required results . 50
6.6 Documentation . 51
6.6.1 Applicability . 51
6.6.2 Requirement . 52
6.6.3 Methods of test and required results . 52
6.7 Functional alert grouping . 52
6.7.1 Applicability . 52
6.7.2 Functional alert group source . 52
6.7.3 Functional alert group display . 55
6.8 Alert aggregation . 57
6.8.1 Applicability . 57
6.8.2 Alert aggregation source . 57
6.8.3 Aggregation display . 59
6.9 Responsibility transfer . 61
6.9.1 EUT performing revaluation . 61
6.9.2 EUT as source of alerts . 62
7 Module B – Central alert management system functionality . 63
7.1 Applicability . 63
7.2 Central alert management human machine interface (CAM-HMI) . 63
7.2.1 General requirements . 63
7.2.2 Aggregated header alerts . 67
7.2.3 Alert history . 68
7.3 Functional aspects of a CAM . 70
7.3.1 Requirement . 70
7.3.2 Methods of test and required results . 70
7.4 Back-up and redundancies . 71
7.4.1 Requirement . 71
7.4.2 Methods of test and required results . 71
7.5 System failures and fallback arrangements . 71
7.5.1 Requirement . 71
7.5.2 Methods of test and required results . 72
8 Module C – Interfacing . 73
8.1 Interfacing requirements for alert-related communication . 73
8.1.1 Communication protocol . 73
8.1.2 Alert priority, state and text . 74
8.1.3 Time of last change . 75
8.1.4 Acknowledgement and silence . 75
8.1.5 Aggregation . 76
8.1.6 Reconnection . 77
8.2 Connection to the ship's power supply . 77
8.2.1 Applicability . 77
8.2.2 Requirement . 77
8.2.3 Methods of test and required results . 77
8.3 Function not in operational use . 77
8.3.1 Applicability . 77
8.3.2 Requirement . 78
8.3.3 Methods of test and required results . 78
9 Module D – System and equipment documentation for CAM system . 78
9.1 Applicability . 78

– 4 – IEC 62923-1:2018  IEC 2018
9.2 Manuals . 78
9.2.1 Requirement . 78
9.2.2 Methods of test and required results . 78
9.3 Information regarding system configuration for surveyor . 78
9.3.1 Requirement . 78
9.3.2 Methods of tests and required results . 79
9.4 Failure analysis . 79
9.4.1 Requirement . 79
9.4.2 Methods of test and required results . 79
9.5 Guidance to equipment manufacturers for the provision of on-board
familiarization material . 79
9.5.1 Requirement . 79
9.5.2 Methods of test and required results . 79
Annex A (informative) Test set-ups . 80
A.1 Applicability . 80
A.2 Purpose . 80
A.3 Generic representation . 80
A.4 Test set-up 1 . 82
A.5 Test set-up 2 . 82
A.6 Test set-up 3 . 83
A.7 Test set-up 4 . 84
Annex B (informative) Guidance to equipment manufacturers for the provision of on-
board familiarization material (Appendix 2 of IMO Resolution MSC.302(87)) . 86
B.1 Applicability . 86
B.2 General . 86
B.3 On-board familiarization . 86
B.4 Familiarization training framework . 87
B.4.1 General description . 87
B.4.2 Detailed operation . 87
Annex C (normative) Logical interfaces for alert communication . 88
C.1 Applicability . 88
C.2 Logical interfaces . 88
C.3 Alert sentences for exchanging alert information . 89
C.4 Alert communication in case of successful revaluation and priority reduction . 91
C.5 Alert communication in case of unsuccessful revaluation . 92
C.6 Additional requirements for use of BAM sentences on IEC 61162-450 . 93
C.6.1 Use of ALF . 93
C.6.2 Use of ALC . 93
C.6.3 Use of ACN . 94
C.6.4 Use of ARC . 94
C.6.5 Use of AGL . 94
C.7 Alert communication in case of inconsistent content of ALF messages . 94
Annex D (informative) Properties of aggregation and functional grouping . 95
Annex E (informative) Guidance on alert management . 96
E.1 Applicability . 96
E.2 Alert management strategic changes . 96
E.3 Alert management tactics . 96
E.4 Alert management means and methods . 97
E.4.1 Overview . 97

E.4.2 Functional alerts . 98
E.4.3 Tools . 100
E.4.4 Clusters . 102
E.4.5 Technical and structural approach . 104
Annex F (normative) Icons for alert management . 105
Annex G (normative) Alert state diagrams . 108
Annex H (normative) Legacy alert handling . 111
H.1 Applicability . 111
H.2 Introduction to legacy alert sources . 111
H.3 Conversion of legacy alerts . 112
H.3.1 Requirement . 112
H.3.2 Methods of test and required results . 112
Annex I (normative) Alert group list (AGL) message for functional grouping . 114
I.1 Applicability . 114
I.2 General . 114
I.3 AGL – Alert group list . 114
Annex J (normative) TAG block for cluster identification . 115
J.1 Applicability . 115
J.2 General . 115
J.3 Destination cluster identification "x" . 115
J.4 Source cluster identification "z" . 115
Annex K (informative) Additional talker identifiers for alert sources . 116
Bibliography . 117

Figure 1 – Interfacing legacy alert sources with BAM compliant equipment . 19
Figure 2 – Example of cluster-dependent alert management limitations . 20
Figure 3 – Multiple alerts with audible annunciation existing simultaneously . 46
Figure 4 – Occurrence of alerts during a temporary silence period . 46
Figure 5 – Escalation of a warning as warning during a temporary silence period . 47
Figure 6 – Occurrence of multiple warnings . 47
Figure A.1 – BAM concept . 81
Figure A.2 – Test set-up 1: no revaluation of input data . 82
Figure A.3 – Test set-up 2: with revaluation of input data . 83
Figure A.4 – Test set-up 3: BAM compliant CAM system . 84
Figure A.5 – Test set-up 4: BAM/CAM system compliant INS . 85
Figure C.1 – Logical interfaces . 88
Figure C.2 – Alert communication showing priority reduction, alert condition rectified . 92
Figure C.3 – Alert communication in case of no priority reduction, with user
acknowledgement . 93
Figure E.1 – Alert management decision flow. 97
Figure E.2 – Clusters and their functional relations . 103
Figure G.1 – State diagram of an alert of priority emergency alarm . 108
Figure G.2 – State diagram of an alert of priority alarm . 109
Figure G.3 – State diagram of an alert of priority warning . 110
Figure G.4 – State diagram of an alert of priority caution . 110

– 6 – IEC 62923-1:2018  IEC 2018
Figure H.1 – Division of functional blocks of alert management when BAM compliant
alert source is interfaced to CAM . 111
Figure H.2 – Division of functional blocks of alert management when legacy alert

source is interfaced to CAM . 111

Table 1 – Alert states and related conditions . 26
Table 2 – Alert state and presentation for emergency alarms . 26
Table 3 – Alert state and presentation for alarms . 27
Table 4 – Alert state and presentation for warnings . 28
Table 5 – Alert state and presentation for cautions . 28
Table C.1 – IEC 61162-1 sentences received by BAM compliant equipment . 90
Table C.2 – IEC 61162-1 sentences transmitted by BAM compliant equipment . 91
Table D.1 – Properties of aggregation and functional grouping . 95
Table F.1 – Alert management icons – basic . 105
Table F.2 – Alert management icons – additional qualifiers . 107
Table F.3 – Alert management icons – selected display status . 107
Table K.1 – Talker identifiers for automation equipment . 116

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
MARITIME NAVIGATION AND RADIOCOMMUNICATION
EQUIPMENT AND SYSTEMS – BRIDGE ALERT MANAGEMENT –

Part 1: Operational and performance requirements,
methods of testing and required test results

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 62923-1 has been prepared by IEC technical committee 80:
Maritime navigation and radiocommunication equipment and systems.
The text of this document is based on the following documents:
FDIS Report on voting
80/892/FDIS 80/897/RVD
Full information on the voting for the approval of this International Standard can be found in
the report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.

– 8 – IEC 62923-1:2018  IEC 2018
A list of all parts in the IEC 62923 series, published under the general title Maritime
navigation and radiocommunication equipment and systems – Bridge alert management, can
be found on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct
understanding of its contents. Users should therefore print this document using a
colour printer.
INTRODUCTION
IEC 62923-1 has been written in pursuit of IMO resolution MSC.302(87), to further detail the
technical requirements of bridge alert management and to enable testing of any equipment
against the requirements of bridge alert management.
Bridge alert management (BAM) is the IMO defined overall concept for the management,
handling and harmonized presentation of alerts on the bridge.
This document has been written in such a way that this form of alert management can be
applied ship wide, next to, and in cooperation with, cluster(s) on the bridge.
Individual equipment that applies the BAM principles uses
• harmonized states for its alerts,
• harmonized presentation for presentation of its alerts, and
• harmonized alert communications for
– communication with other equipment (VDR and equipment with more knowledge, as
applicable), and
– communication with a central alert management (CAM) system, if provided on board.
A CAM system, including its human machine interface(s) (HMI),
• uses harmonized states for its alerts,
• uses harmonized presentation for presentation of all alerts generated on the bridge,
• uses harmonized alert communications for communication with other equipment (VDR,
alert source equipment),
• provides the function to silence all audible alerts on the bridge, and
• provides the function to individually acknowledge all alerts generated on the bridge for
which additional decision support information is not required;
A CAM system may be standalone or combined with other equipment, for example in the case
of an integrated navigation system (INS).
All equipment that applies the BAM principles may provide intelligence to deal with the
processing of non-BAM "legacy" alarm communications for harmonized presentation at its
HMI.
This document provides the harmonization requirements.

– 10 – IEC 62923-1:2018  IEC 2018
MARITIME NAVIGATION AND RADIOCOMMUNICATION
EQUIPMENT AND SYSTEMS – BRIDGE ALERT MANAGEMENT –

Part 1: Operational and performance requirements,
methods of testing and required test results

1 Scope
This part of IEC 62923 specifies the operational and performance requirements, methods of
testing, and required test results for the bridge alert management (BAM) in support of IMO
resolution MSC.302(87). It is applicable to all alerts presented on and transferred to the
bridge.
NOTE All text of this document whose wording is identical to that of IMO resolution MSC.302(87) is printed in
italics, and the resolution and associated performance standard paragraph numbers are indicated in brackets.
(MSC.302/2) To enhance the safety of operation, the Performance standards given in
resolution MSC.302(87) provide requirements for the harmonized presentation and treatment
of alerts on the bridge and specify a central alert management (CAM) system.
Annex E provides guidance on design principles that, when applied, will achieve the desired
enhancement of safety.
(MSC.302/3) Module A (Clause 6) of this document describes the general concept of the BAM
and the presentation of alerts on the bridge equipment. Modules B (Clause 7) and D
(Clause 9) contain requirements for the CAM and the CAM-HMI. Module C (Clause 8)
describes the interface requirements for BAM.
BAM is a concept that imposes requirements on equipment that handles and presents alerts
on the bridge, including equipment that provides central alert management (CAM) system
functionalities.
• Equipment is BAM compliant if it meets Module A – Presentation and handling of alerts on
the bridge and Module C – Interfacing of this document.
• Equipment is CAM system compliant if it is BAM compliant equipment and, in addition,
meets Module B – Central alert management system functionality and Module D – System
and equipment documentation for CAM system of this document.
To support retrofitting a ship with BAM compliant equipment handling alert related
communication with remaining non-BAM compliant equipment (referred to as "legacy alert
sources"), this document includes guidance on how to interface BAM compliant equipment
with remaining devices that are not BAM compliant (see 4.4 and Annex H).
IEC 62923-2 provides standardized alert and cluster identifiers and other additional features.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their
content constitutes requirements of this document. For dated references, only the edition
cited applies. For undated references, the latest edition of the referenced document (including
any amendments) applies.
IEC 60945:2002, Maritime navigation and radiocommunication equipment and systems –
General requirements – Methods of testing and required test results

IEC 61162-1, Maritime navigation and radiocommunication equipment and systems – Digital
interfaces – Part 1: Single talker and multiple listeners
IEC 61162-450, Maritime navigation and radiocommunication equipment and systems –
Digital interfaces – Multiple talkers and multiple listeners – Ethernet interconnection
IEC 61924-2, Maritime navigation and radiocommunication equipment and systems –
Integrated navigation systems – Part 2: Modular structure for INS – Operational and
performance requirements, methods of testing and required test results
IEC 62288, Maritime navigation and radiocommunication equipment and systems –
Presentation of navigation-related information on shipborne navigational displays – General
requirements, methods of testing and required test results
IEC 62923-2:2018, Maritime navigation and radiocommunication equipment and systems –
Bridge alert management – Part 2: Alert and cluster identifiers and other additional features
IMO MSC.302(87), Performance standards for bridge alert management (BAM)
3 Terms, definitions and abbreviated terms
For the purposes of this document, the following terms, definitions and abbreviated terms
apply.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1 Terms and definitions
3.1.1
active alert
alert that is not in state "normal"
3.1.2
aggregated header alert
(MSC.302/A) alert indicating the existence of multiple individual alerts of the same kind,
transmitted by the aggregation source with alert state and alert ID determined by the
associated aggregation-member alerts, with alert instance 0 and with, in the alert title and/or
alert description text, an aggregation header representing the aggregation
3.1.3
aggregation
(MSC.302/A) single combination of an aggregated header alert and associated individual
aggregation-member alerts that all have the same alert identifier and the same aggregation
source, to provide one alert (one aggregated header alert represents plenty of individual
aggregation-member alerts)
3.1.4
aggregation header
title of an aggregation, under which the associated aggregation-member alerts are sorted,
indicating the generic part of the aggregation-member alerts, and defined by the aggregation
source
Note 1 to entry: The header may contain the current number of aggregation-member alerts in that aggregation
(see 8.1.5).
– 12 – IEC 62923-1:2018  IEC 2018
3.1.5
aggregation source
BAM compliant equipment that defines an aggregation of (some of) its alerts
3.1.6
aggregation-member alert
individual alert that is defined by its source as part of an aggregation
3.1.7
alarm
high-priority alert
(MSC.302/A) condition requiring immediate attention and action by the bridge team, to
maintain the safe navigation and safe operation of the ship
3.1.8
alert
(MSC.302/A) announcement of abnormal situations and conditions requiring attention
Note 1 to entry: Alerts are divided in four priorities: emergency alarms, alarms, warnings and cautions. An alert
provides information about a defined state change in connection with information about how to announce this event
in a defined way to the system and the operator.
3.1.9
alert anno
...