IEC 61924-2:2012

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 61924-2:2012(E) specifies the minimum requirements for the design, manufacture, integration, methods of testing and required test results for an integrated navigation system (INS) to comply with the International Maritime Organization (IMO) requirements of Resolution MSC.252(83). In addition, it takes account of IMO Resolution A.694(17) to which IEC 60945 is associated. When a requirement in this standard is different from IEC 60945, the requirement of this standard takes precedence. The contents of the corrigendum of November 2013 have been included in this copy.

Matériels et systèmes de navigation et de radiocommunication maritimes - Systèmes de navigation intégrés - Partie 2: Structure modulaire des systèmes de navigation intégrés - Exigences opérationnelles et de fonctionnement, méthodes d'essai et résultats d'essai exigés

General Information

• Status: Published
• Publication Date: 04-Dec-2012
• ICS: 29.140.30 - Fluorescent lamps. Discharge lamps
• ICS: 47.020.70 - Navigation and control equipment
• Technical Committee: TC 80 - Maritime navigation and radiocommunication equipment and systems
• Drafting Committee: WG 10A - TC 80/WG 10A
• Current Stage: DELPUB - Deleted Publication
• Start Date: 12-Feb-2021
• Completion Date: 28-Feb-2019

Relations

• Corrected By: IEC 61924-2:2012/COR1:2013 - Corrigendum 1 - Maritime navigation and radiocommunication equipment and systems - Integrated navigation systems - Part 2: Modular structure for INS - Operational and performance requirements, methods of testing and required test results
• Effective Date: 05-Sep-2023
• Revised: IEC 61924-2:2021 - Maritime navigation and radiocommunication equipment and systems - Integrated navigation systems (INS) - Part 2: Modular structure for INS - Operational and performance requirements, methods of testing and required test results
• Effective Date: 05-Sep-2023

Overview

IEC 61924-2:2012 - “Maritime navigation and radiocommunication equipment and systems - Integrated navigation systems (INS) - Part 2: Modular structure for INS” defines minimum operational and performance requirements, methods of testing, and required test results for Integrated Navigation Systems. The standard is intended to ensure INS design, manufacture, integration and testing meet IMO requirements (Resolution MSC.252(83)). It also accounts for IMO Resolution A.694(17) and its association with IEC 60945; where differences exist, IEC 61924-2 takes precedence. The published copy includes the corrigendum of November 2013.

Key Topics and Technical Requirements

• Modular architecture: Organizes INS requirements into modules (A–D) covering integration, task-related functions, alert management and documentation.
• Module A – Integration of navigational information: Interfaces and data exchange, data availability/validity/integrity, accuracy, plausibility, latency, consistent common reference system (CCRS), integrity monitoring and sensor/source selection.
• Module B – Task-related INS functions: Requirements for route planning, route monitoring, collision avoidance, navigation control data, alert handling, displays, human–machine interface (HMI), redundancies and fallback operation.
• Module C – Alert management: Logical architecture, priorities and categories of alerts (alarms, warnings, cautions), consistent presentation, central alert HMI, audible/visual annunciation, escalation, self-monitoring and interface requirements for alert communication.
• Module D – Documentation: Manuals, system configuration records, failure analysis and onboard familiarization material.
• Testing and certification: Test site requirements, methods of test, exceptions for previously performed tests, and required test results to demonstrate compliance.

Practical Applications

• Ensures interoperability and safe operation of shipboard Integrated Navigation Systems (INS) by standardizing how sensors, processors and displays share and present navigation data.
• Used to design and validate INS features such as collision avoidance, route monitoring, automatic control functions and centralized alert handling.
• Provides test procedures and pass/fail criteria for manufacturers, test labs and shipyards to verify system performance and compliance with IMO regulations.

Who Should Use This Standard

• Marine electronics manufacturers and system integrators designing INS
• Shipbuilders and naval architects for equipment selection and installation
• Flag state surveyors, classification societies and test laboratories conducting certification and compliance testing
• Ship operators and bridge system engineers responsible for procurement, commissioning and crew familiarization

Related Standards and Regulations

• IEC 60945 (marine equipment environmental and performance requirements) - where differences occur IEC 61924-2 prevails
• IMO Resolution MSC.252(83) (performance standards for INS)
• IMO Resolution A.694(17) (related navigational standards)

Keywords: IEC 61924-2, Integrated Navigation System, INS standard, maritime navigation, performance requirements, methods of testing, alert management, IEC 60945, IMO MSC.252(83).

Standards Content (Sample)

IEC 61924-2 ®
Edition 1.0 2012-12
INTERNATIONAL
STANDARD
colour
inside
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

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IEC 61924-2 ®
Edition 1.0 2012-12
INTERNATIONAL
STANDARD
colour
inside
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

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
XG
ICS 47.020.70 ISBN 978-2-83220-503-7

– 2 – 61924-2 © IEC:2012(E)
CONTENTS
FOREWORD . 7
1 Scope . 9
2 Normative references . 9
3 Terms, definitions and abbreviations . 10
3.1 Terms and definitions . 10
3.2 Abbreviations . 19
4 MSC resolutions . 19
4.1 General . 19
4.2 Purpose of integrated navigation systems . 20
4.3 Application . 21
5 Test requirements and results . 23
5.1 General . 23
5.2 Exceptions for tests previously performed . 23
5.3 Test site . 23
5.4 Methods of test. 24
6 Module A – Requirements for integration of navigational information . 24
6.1 Interfacing and data exchange. 24
6.1.1 Combination, processing and evaluation of data . 24
6.1.2 Availability, validity and integrity . 24
6.1.3 Failure of data exchange . 25
6.1.4 Interfaces in general . 25
6.1.5 Interface to alert management . 25
6.2 Accuracy . 25
6.2.1 Requirement . 25
6.2.2 Methods of test and required results . 25
6.3 Validity, plausibility, latency . 26
6.3.1 Validity . 26
6.3.2 Plausibility . 27
6.3.3 Latency . 27
6.4 Consistent common reference system (CCRS) . 28
6.4.1 Consistency of data . 28
6.4.2 Consistent common reference point (CCRP) . 28
6.4.3 Consistency of thresholds . 30
6.5 Integrity monitoring . 31
6.5.1 Requirement . 31
6.5.2 Methods of test and required results . 32
6.6 Marking of data . 33
6.6.1 Requirement . 33
6.6.2 Methods of tests and required results . 33
6.7 Selection of sensors and sources . 33
6.7.1 Requirement . 33
6.7.2 Methods of test and required results . 34
7 Module B – Task related requirements for Integrated Navigation Systems . 34
7.1 Description . 34
7.2 Task and functional requirements for an INS . 35
7.2.1 General . 35

61924-2 © IEC:2012(E) – 3 –
7.2.2 Task “Route planning” . 35
7.2.3 Task “Route monitoring” . 37
7.2.4 Task “Collision Avoidance” . 40
7.2.5 Task “Navigation Control Data” . 44
7.2.6 Task “Alert management“ . 46
7.2.7 Task “Status and data display“ . 46
7.3 Functional requirements for INS task stations . 47
7.3.1 Number of task stations . 47
7.3.2 Track control . 49
7.3.3 Automatic control functions . 49
7.4 Functional requirements for displays of INS . 50
7.4.1 General . 50
7.4.2 Default display configurations and operational modes. 53
7.4.3 Mode and status awareness . 54
7.4.4 Information display . 55
7.5 Human machine interface . 56
7.5.1 General . 56
7.5.2 System design . 57
7.5.3 Display . 57
7.5.4 Input . 57
7.6 INS Back-up requirements and redundancies . 58
7.6.1 General . 58
7.6.2 Hardware redundancies (back-up) . 60
7.7 System failures and fallback arrangement . 60
7.7.1 General description . 60
7.7.2 Restored operation . 60
7.7.3 Failure or change of sensor for automatic control function . 61
7.7.4 Failure of sensor. 61
7.7.5 Storage of system related parameters . 62
7.7.6 Safe response to malfunction . 62
7.7.7 Alert management . 63
7.7.8 Fallback for navigational information failure . 64
7.8 Technical requirements . 65
7.8.1 General . 65
7.8.2 Hardware and/or processors . 66
7.8.3 Power supply . 66
7.8.4 Power interruptions and shutdown . 67
7.8.5 Data communication interface and protocols . 68
7.8.6 Installation . 68
8 Module C – Alert management. 69
8.1 Description . 69
8.1.1 Purpose of alert management . 69
8.1.2 Scope of alert management . 69
8.1.3 Application of alert management . 69
8.2 General requirements . 70
8.2.1 Provisions . 70
8.2.2 Number of alerts for one situation . 70
8.2.3 Alerts to be handled by the alert management . 70
8.2.4 Logical architecture of the alert management . 71

– 4 – 61924-2 © IEC:2012(E)
8.2.5 Alert management HMI . 71
8.2.6 Audible announcements . 72
8.2.7 Display at several locations . 72
8.3 Priorities and categories . 72
8.3.1 Priorities of alerts . 72
8.3.2 Criteria for classification of alerts. 73
8.3.3 Categories of alerts . 73
8.4 State of alerts . 74
8.4.1 General . 74
8.4.2 Alarms . 76
8.4.3 Warnings . 80
8.4.4 Cautions . 84
8.4.5 Alert escalation . 84
8.5 Consistent presentation of alerts within the INS . 86
8.5.1 Requirement . 86
8.5.2 Methods of test and required results . 86
8.6 Central alert management HMI . 88
8.6.1 General requirements . 88
8.6.2 Silencing of audible alerts . 91
8.6.3 Category A and B alert history list. 91
8.7 Acknowledgement location . 93
8.7.1 Requirement . 93
8.7.2 Methods of test and required results . 93
8.8 Self-monitoring of alert management . 94
8.8.1 Monitoring of system communication . 94
8.8.2 Testing of alerts . 94
8.8.3 Failures . 94
8.9 Interface requirements for alert related communication . 95
8.9.1 Communication concept . 95
8.9.2 Alert priorities, states, etc. . 95
8.9.3 Alert source identity . 97
8.9.4 Acknowledge and silence . 98
8.9.5 Fault tolerance of alert communication . 99
8.10 Integration of systems in alert management. 99
8.10.1 Overall alert management . 99
8.10.2 Inclusion of other equipment . 100
8.10.3 Connection of other equipment . 100
9 Module D – Documentation requirements . 100
9.1 Manuals . 100
9.1.1 Requirement . 100
9.1.2 Methods of tests and required results . 101
9.2 Information regarding the system configuration . 101
9.2.1 Requirement . 101
9.2.2 Methods of tests and required results . 102
9.3 Failure analysis . 102
9.3.1 Requirement . 102
9.3.2 Methods of test and required results . 102
9.4 Onboard familiarization material . 102
9.4.1 Requirement . 102

61924-2 © IEC:2012(E) – 5 –
9.4.2 Methods of test and required results . 102
Annex A (informative) Modular structure for IMO performance standards . 104
Annex B (informative) Guidance to equipment manufacturers for the provision of on-
board familiarization material . 107
Annex C (normative) Classification of alerts . 110
Annex D (normative) Default display configurations . 112
Annex E (informative) Data flow diagram/consistent common reference system
(CCRS) . 114
Annex F (normative) IEC 61162 interfaces . 116
Annex G (informative) Guidance for testing . 120
Annex H (normative)  Verification of CCRP calculations . 122
Annex I (normative)  Sentence for integrity and plausibility . 124
Annex J (normative)  INS alert related communication . 125
Annex K (normative)  Sentences for advanced alert related communication . 138
Annex L (normative) Alert communication with ALR and ACK . 143
Annex M (normative) Icons for alert management . 146
Bibliography . 148

Figure E.1 – Data flow diagram/consistent common reference system (CCRS) . 115
Figure F.1 – INS logical interfaces . 116
Figure J.1 – Legacy sensor communication showing priority reduction . 128
Figure J.2 – Legacy sensor communication in case priority reduction is not possible . 129
Figure J.3 – Alerts' communication showing priority reduction . 131
Figure J.4 – Alerts with communication in case priority reduction is not possible . 132
Figure J.5 – Alert state diagram . 136
Figure L.1 – State diagram. 143

Table 1 – Applicable modules of performance standards of stand alone equipment. 22
Table 2 – Applicable modules of other standards for INS to substitute for individual
equipment . 22
Table 3 – Marking of data . 33
Table 4 – Announcement states and related conditions . 74
Table 5 – Announcement state and presentation for Alarms . 75
Table 6 – Announcement state and presentation for Warnings . 75
Table 7 – Announcement state and presentation for Cautions . 76
Table A.1 – Modular structure for radar performance standards . 104
Table A.2 – Modular structure for track control performance standards . 106
Table C.1 – Classification of INS alerts as specified in these performance standards . 110
Table C.2 – Classification for INS for alerts specified in the individual equipment
performance standards . 110
Table D.1 – Task “Route monitoring” . 112
Table D.2 – Task “Collision avoidance” . 112
Table F.1 – IEC 61162-1 sentences transmitted by the INS . 117
Table F.2 – IEC 61162-1 sentences received by the INS . 118

– 6 – 61924-2 © IEC:2012(E)
Table H.1 – Required results . 122
Table H.2 – Required results . 123
Table H.3 – Required results for dynamic scenario . 123
Table H.4 – Required resolution for test . 123
Table J.1 – Conversion from ALR to ALF . 126
Table J.2 – Conversion from ACN to ACK . 127
Table J.3 – Unique alert identifier at alert source . 134
Table M.1 – Alert management icons – Basic . 146
Table M.2 – Alert management icons – Additional qualifiers . 147

61924-2 © IEC:2012(E) – 7 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
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

FOREWORD
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International Standard IEC 61924-2 has been prepared by IEC technical committee 80:
Maritime navigation and radiocommunication equipment and systems.
The text of this standard is based on the following documents:
FDIS Report on voting
80/677/FDIS 80/684/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.

– 8 – 61924-2 © IEC:2012(E)
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts in the IEC 61924 series, published under the general title Maritime
navigation and radiocommunication equipment and systems – Integrated navigation systems,
can be found on the IEC website.
Text in italics signifies that the wording is identical to that of the referenced IMO resolution
and/or the SOLAS convention.
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
A bilingual version of this standard may be issued at a later date.
The contents of the corrigendum of November 2013 have been included in this copy.
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.
61924-2 © IEC:2012(E) – 9 –
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

1 Scope
This part of IEC 61924 specifies the minimum requirements for the design, manufacture,
integration, methods of testing and required test results for an integrated navigation system
(INS) to comply with the International Maritime Organization (IMO) requirements of Resolution
MSC.252(83). In addition, it takes account of IMO Resolution A.694(17) to which IEC 60945 is
associated. When a requirement in this standard is different from IEC 60945, the requirement
of this standard takes precedence.
NOTE 1 IEC 61924:2006 specifies the minimum requirements for the design, manufacture, integration, methods
of testing and required test results for an integrated navigation system to comply with the earlier IMO requirements
of Resolution MSC 86(70), Annex 3. Integrated navigation systems in accordance with IEC 61924:2006 are not
suitable for installation after 1 January 2011.
NOTE 2 All text of this standard, whose wording is identical to that in IMO Resolution MSC.252(83) will be printed
in italics and the Resolution and paragraph number indicated between brackets.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and
are indispensable for its application. 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 (all parts), Maritime navigation and radiocommunication equipment and systems –
Digital interfaces
IEC 61162-1:2010, Maritime navigation and radiocommunication equipment and systems –
Digital interfaces – Part 1: Single talker and multiple listeners
IEC 61162-2, Maritime navigation and radiocommunication equipment and systems – Digital
interfaces – Part 2: Single talker and multiple listeners, high-speed transmission
IEC 61162-3, Maritime navigation and radiocommunication equipment and systems – Digital
interfaces – Part 3: Serial data instrument network
IEC 61162-450, Maritime navigation and radiocommunication equipment and systems –
Digital interfaces – Part 450: Multiple talkers and multiple listeners – Ethernet interconnection
IEC 61174:2008, Maritime navigation and radiocommunication equipment and systems –
Electronic chart display and information system (ECDIS) – Operational and performance
requirements, methods of testing and required test results

– 10 – 61924-2 © IEC:2012(E)
IEC 62065:2002, Maritime navigation and radiocommunication equipment and systems –
Track control systems – Operational and performance requirements, methods of testing and
required test results
IEC 62288:2008, 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 62388:2007, Maritime navigation and radiocommunication equipment and systems –
Shipborne radar – Performance requirements, methods of testing and required test results
IEC 62616:2010, Maritime navigation and radiocommunication equipment and systems –
Bridge navigational watch alarm system (BNWAS)
IMO A.694(17), General requirements for shipborne radio equipment forming part of the
Global maritime distress and safety system (GMDSS) and for electronic navigational aids
IMO/ICAO, International Aeronautical and Maritime Search and Rescue Manual (IAMSAR
Manual) Volume 3
IMO MSC/Circ.982, Guidelines on ergonomic criteria for bridge equipment and layout
IMO MSC.191(79), Performance standards for presentation of navigation-related information
on shipborne navigational displays
IMO MSC.232(82), Revised performance standards for Electronic Chart Display and
Information Systems (ECDIS)
IMO MSC.252(83), Performance Standards for Integrated Navigation Systems (INS)
IMO MSC.302(87), Performance standards for Bridge Alert Management (BAM)
ISO 11674:2006, Ships and marine technology – Heading control systems
3 Terms, definitions and abbreviations
3.1 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1.1
accuracy
degree of conformance between the estimated or measured parameter value at a given time
and its true parameter value at that time
3.1.2
added value
functionality and information, which are provided by the INS, in addition to the requirements of
the performance standard for the individual equipment
3.1.3
aggregated alert
alert indicating the existence of multiple individual alerts of the same kind

61924-2 © IEC:2012(E) – 11 –
3.1.4
aid to navigation
AtoN
any device or system external to a vessel intended to assist a navigator to determine position
or safe course, or to warn of hazards to navigation
3.1.5
alarm
the highest priority of an alert as defined in MSC.252(83). Announcing a situation or condition
requiring immediate attention, decision and if necessary action by the bridge team, to
maintain the safe navigation of the ship
3.1.6
alert
announcing abnormal situations and conditions requiring attention, decision and/or action.
Alerts are divided in three priorities: alarms, warnings and cautions
3.1.7
alert announcements
visual and where applicable acoustical presentation of alerts
3.1.8
alert history list
accessible list of past alerts
3.1.9
alert management
concept for the harmonized regulation of the monitoring, handling, distribution and
presentation of alerts on the bridge
3.1.10
announcement
visual and/or audible signal issued to the user by the system
3.1.11
automatic control functions
functions that include automatic heading, and/or track and/or speed control or other
navigation related automatic control functions
3.1.12
backup
use of data, function and/or hardware of similar type and quality
3.1.13
Category A alerts
alerts where graphical e.g. radar, ECDIS, information at the task station directly assigned to
the function generating the alert is necessary, as decision support for the evaluation the alert
related condition
3.1.14
Category B alerts
alerts where no additional information for decision support is necessary besides the
information which can be presented at the central alert management HMI

– 12 – 61924-2 © IEC:2012(E)
3.1.15
caution
lowest priority of an alert. Raising bridge team’s awareness of a condition which does not
warrant an alarm or warning condition, but still requires attention out of the ordinary
consideration of the situation or of given information
3.1.16
collision avoidance
navigational task of detecting and plotting other ships and objects to avoid collisions
3.1.17
configuration in use
sub-systems (e.g. sensors and sources, MFD workstations, automatic control function, etc.)
selected for use and tasks (e.g. collision avoidance, route monitoring, etc.) selected operative
in each MFD
Note 1 to entry: This is a subset of the available configuration which is a subset of the complete system
configuration.
3.1.18
conning position
place on the bridge with a commanding view and which is used by navigators when
commanding, manoeuvring and controlling a ship
3.1.19
consistent common reference point
CCRP
location on own ship, to which all horizontal measurements such as target range, bearing,
relative course, relative speed, closest point of approach (CPA) or time to closest point of
approach (TCPA) are referenced, typically the conning position of the bridge
3.1.20
consistent common reference system
CCRS
sub-system or function of an INS for acquisition, processing, storage, surveillance and
distribution of data and information providing identical and obligatory reference to sub-
systems and subsequent functions within an INS and to other connected equipment, if
available
Note 1 to entry: Examples of reference are: coordinate system, time zone, chart datum and depth datum.
3.1.21
degraded condition
reduction in system functionality resulting from failure
3.1.22
detected hazard
hazard identified by a sensor (for example, radar or echo sounder) or reported by a
communication device (for example AIS or NAVTEX) and which is available to the INS
3.1.23
entry field
location on a display for the input of data by the operator
Note 1 to entry: The requested information is usually alphanumeric.
3.1.24
essential functions
indispensable functions to be available as required for the relevant operational use

61924-2 © IEC:2012(E) – 13 –
3.1.25
essential information
indispensable information to be available as required for the relevant functions
3.1.26
expected precision
deviation between the measured value and the true value that is normally not exceeded by a
typical system
3.1.27
external safety related messages
data received from outside of the ship concerning the safety of navigation, through equipment
listed in SOLAS chapter V and/or NAVTEX
3.1.28
failure analysis
logical, systematic examination of an item, including its diagrams or formulas, to identify and
analyse the probability, causes and consequences of potential and real failures
3.1.29
fallback
use of data, function or hardware of degraded quality in relation to the failed one, e.g. dead
reckoning for position information, heading control in case of a failure of track control
3.1.30
functionality
ability to perform an intended function
Note 1 to entry: The activity of performing a function normally employs a system of displays, controls and
instrumentation.
3.1.31
hazard
objects or conditions potentially dangerous to navigation, possibly leading to grounding or
collision, that may be detected by a sensor, reported by a communication device, retrieved
from a database or manually input to the INS
3.1.32
human factor
workload, capabilities and limits of a user trained according to the regulations of the IMO
3.1.33
human machine interface
HMI
the part of a system an operator interacts with. The interface is the aggregate of means by
which the users interact with a machine, device, and system (the system). The interface
provides means for input, allowing the users to control the system and output, allowing the
system to inform the users
3.1.34
indication
display of regular information and conditions, not part of alert management
3.1.35
integrated navigation system
INS
a composite navigation system which performs at least the following tasks: collision
avoidance, route monitoring thus providing “added value” for the operator to plan, monitor and

– 14 – 61924-2 © IEC:2012(E)
safely navigate the progress of the ship. The INS allows meeting the respective parts of
SOLAS regulation V/19 and supports the proper application of SOLAS regulation V/15
3.1.36
inspection
visual check of equipment or documentation
3.1.37
instance
unit/module on functional level which can generate, process and/or present alerts
3.1.38
integrity
ability of the INS to provide the user with information within the specified accuracy in a timely,
complete and unambiguous manner, and alerts within a specified time when the system should
be used with caution or not at all
3.1.39
integrity monitoring
ability of a system to provide the user with information within the specified accuracy in a
timely, complete and unambiguous manner, and to present warnings and indications within a
specified time when the system should be used with caution or not at all
3.1.40
known hazard
hazard retrieved from a database (including navigational charts and nautical publications) or
manually input and which is available to the INS
3.1.41
latency
time interval between an event and its result, including time for reception, processing,
transmission and display
3.1.42
leg
ship’s intended ground track between two waypoints
3.1.43
man-over-board mode
MOB
display mode for operations and actions of a ship after a Man-over-board accident happened
(release of safety equipment, e.g., life buoy and life belt, performance of a return manoeuvre
etc.)
3.1.44
manufacturer
organisation responsible for the production of all or some of the parts of the INS, including the
responsibility that these parts meet their appropriate international standards
Note 1 to entry: A manufacturer may also be the system integrator.
3.1.45
marking
visual or logical indication of the status of displayed or transferred information

61924-2 © IEC:2012(E) – 15 –
3.1.46
mode
setting of a group of parameters determining the behaviour (operational modes) or the Human
Machine Interface (HMI) (display modes) or the control functions (control modes) of the
equipment and/or its sensors
3.1.47
mode awareness
the perception of the mariner regarding the currently active Modes o
...

IEC 61924-2 ®
Edition 1.0 2012-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
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

Matériels et systèmes de navigation et de radiocommunication maritimes –
Systèmes de navigation intégrés –
Partie 2: Structure modulaire des systèmes de navigation intégrés – Exigences
opérationnelles et de fonctionnement, méthodes d'essai et résultats d'essai
exigés
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IEC 61924-2 ®
Edition 1.0 2012-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
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

Matériels et systèmes de navigation et de radiocommunication maritimes –

Systèmes de navigation intégrés –

Partie 2: Structure modulaire des systèmes de navigation intégrés – Exigences

opérationnelles et de fonctionnement, méthodes d'essai et résultats d'essai

exigés
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 47.020.70 ISBN 978-2-8322-0000-0

– 2 – IEC 61924-2:2012 © IEC 2012

CONTENTS
FOREWORD . 7

1 Scope . 9

2 Normative references . 9

3 Terms, definitions and abbreviations . 10

3.1 Terms and definitions . 10

3.2 Abbreviations . 19

4 MSC resolutions . 19

4.1 General . 19
4.2 Purpose of integrated navigation systems . 20
4.3 Application . 21
5 Test requirements and results . 23
5.1 General . 23
5.2 Exceptions for tests previously performed . 23
5.3 Test site . 23
5.4 Methods of test. 24
6 Module A – Requirements for integration of navigational information . 24
6.1 Interfacing and data exchange. 24
6.1.1 Combination, processing and evaluation of data . 24
6.1.2 Availability, validity and integrity . 24
6.1.3 Failure of data exchange . 25
6.1.4 Interfaces in general . 25
6.1.5 Interface to alert management . 25
6.2 Accuracy . 25
6.2.1 Requirement . 25
6.2.2 Methods of test and required results . 25
6.3 Validity, plausibility, latency . 26
6.3.1 Validity . 26
6.3.2 Plausibility . 27
6.3.3 Latency . 27
6.4 Consistent common reference system (CCRS) . 28
6.4.1 Consistency of data . 28
6.4.2 Consistent common reference point (CCRP) . 28

6.4.3 Consistency of thresholds . 30
6.5 Integrity monitoring . 31
6.5.1 Requirement . 31
6.5.2 Methods of test and required results . 32
6.6 Marking of data . 33
6.6.1 Requirement . 33
6.6.2 Methods of tests and required results . 33
6.7 Selection of sensors and sources . 33
6.7.1 Requirement . 33
6.7.2 Methods of test and required results . 34
7 Module B – Task related requirements for Integrated Navigation Systems . 34
7.1 Description . 34
7.2 Task and functional requirements for an INS . 35
7.2.1 General . 35

7.2.2 Task “Route planning” . 35

7.2.3 Task “Route monitoring” . 37

7.2.4 Task “Collision Avoidance” . 40

7.2.5 Task “Navigation Control Data” . 44

7.2.6 Task “Alert management“ . 46

7.2.7 Task “Status and data display“ . 46

7.3 Functional requirements for INS task stations . 47

7.3.1 Number of task stations . 47

7.3.2 Track control . 49

7.3.3 Automatic control functions . 49

7.4 Functional requirements for displays of INS . 50
7.4.1 General . 50
7.4.2 Default display configurations and operational modes. 53
7.4.3 Mode and status awareness . 54
7.4.4 Information display . 55
7.5 Human machine interface . 56
7.5.1 General . 56
7.5.2 System design . 57
7.5.3 Display . 57
7.5.4 Input . 57
7.6 INS Back-up requirements and redundancies . 58
7.6.1 General . 58
7.6.2 Hardware redundancies (back-up) . 60
7.7 System failures and fallback arrangement . 60
7.7.1 General description . 60
7.7.2 Restored operation . 60
7.7.3 Failure or change of sensor for automatic control function . 61
7.7.4 Failure of sensor. 61
7.7.5 Storage of system related parameters . 62
7.7.6 Safe response to malfunction . 62
7.7.7 Alert management . 63
7.7.8 Fallback for navigational information failure . 64
7.8 Technical requirements . 65
7.8.1 General . 65
7.8.2 Hardware and/or processors . 66

7.8.3 Power supply . 66
7.8.4 Power interruptions and shutdown . 67
7.8.5 Data communication interface and protocols . 68
7.8.6 Installation . 68
8 Module C – Alert management. 69
8.1 Description . 69
8.1.1 Purpose of alert management . 69
8.1.2 Scope of alert management . 69
8.1.3 Application of alert management . 69
8.2 General requirements . 70
8.2.1 Provisions . 70
8.2.2 Number of alerts for one situation . 70
8.2.3 Alerts to be handled by the alert management . 70
8.2.4 Logical architecture of the alert management . 71

– 4 – IEC 61924-2:2012 © IEC 2012

8.2.5 Alert management HMI . 71

8.2.6 Audible announcements . 72

8.2.7 Display at several locations . 72

8.3 Priorities and categories . 72

8.3.1 Priorities of alerts . 72

8.3.2 Criteria for classification of alerts. 73

8.3.3 Categories of alerts . 73

8.4 State of alerts . 74

8.4.1 General . 74

8.4.2 Alarms . 76

8.4.3 Warnings . 80
8.4.4 Cautions . 84
8.4.5 Alert escalation . 84
8.5 Consistent presentation of alerts within the INS . 86
8.5.1 Requirement . 86
8.5.2 Methods of test and required results . 86
8.6 Central alert management HMI . 88
8.6.1 General requirements . 88
8.6.2 Silencing of audible alerts . 91
8.6.3 Category A and B alert history list. 91
8.7 Acknowledgement location . 93
8.7.1 Requirement . 93
8.7.2 Methods of test and required results . 93
8.8 Self-monitoring of alert management . 94
8.8.1 Monitoring of system communication . 94
8.8.2 Testing of alerts . 94
8.8.3 Failures . 94
8.9 Interface requirements for alert related communication . 95
8.9.1 Communication concept . 95
8.9.2 Alert priorities, states, etc. . 95
8.9.3 Alert source identity . 97
8.9.4 Acknowledge and silence . 98
8.9.5 Fault tolerance of alert communication . 99
8.10 Integration of systems in alert management. 99
8.10.1 Overall alert management . 99

8.10.2 Inclusion of other equipment . 100
8.10.3 Connection of other equipment . 100
9 Module D – Documentation requirements . 100
9.1 Manuals . 100
9.1.1 Requirement . 100
9.1.2 Methods of tests and required results . 101
9.2 Information regarding the system configuration . 101
9.2.1 Requirement . 101
9.2.2 Methods of tests and required results . 102
9.3 Failure analysis . 102
9.3.1 Requirement . 102
9.3.2 Methods of test and required results . 102
9.4 Onboard familiarization material . 102
9.4.1 Requirement . 102

9.4.2 Methods of test and required results . 102

Annex A (informative) Modular structure for IMO performance standards . 104

Annex B (informative) Guidance to equipment manufacturers for the provision of on-

board familiarization material . 107

Annex C (normative) Classification of alerts . 110

Annex D (normative) Default display configurations . 112

Annex E (informative) Data flow diagram/consistent common reference system

(CCRS) . 114

Annex F (normative) IEC 61162 interfaces . 116

Annex G (informative) Guidance for testing . 120
Annex H (normative)  Verification of CCRP calculations . 122
Annex I (normative)  Sentence for integrity and plausibility . 124
Annex J (normative)  INS alert related communication . 125
Annex K (normative)  Sentences for advanced alert related communication . 138
Annex L (normative) Alert communication with ALR and ACK . 143
Annex M (normative) Icons for alert management . 146
Bibliography . 148

Figure E.1 – Data flow diagram/consistent common reference system (CCRS) . 115
Figure F.1 – INS logical interfaces . 116
Figure J.1 – Legacy sensor communication showing priority reduction . 128
Figure J.2 – Legacy sensor communication in case priority reduction is not possible . 129
Figure J.3 – Alerts' communication showing priority reduction . 131
Figure J.4 – Alerts with communication in case priority reduction is not possible . 132
Figure J.5 – Alert state diagram . 136
Figure L.1 – State diagram. 143

Table 1 – Applicable modules of performance standards of stand alone equipment. 22
Table 2 – Applicable modules of other standards for INS to substitute for individual
equipment . 22
Table 3 – Marking of data . 33
Table 4 – Announcement states and related conditions . 74

Table 5 – Announcement state and presentation for Alarms . 75
Table 6 – Announcement state and presentation for Warnings . 75
Table 7 – Announcement state and presentation for Cautions . 76
Table A.1 – Modular structure for radar performance standards . 104
Table A.2 – Modular structure for track control performance standards . 106
Table C.1 – Classification of INS alerts as specified in these performance standards . 110
Table C.2 – Classification for INS for alerts specified in the individual equipment

performance standards . 110
Table D.1 – Task “Route monitoring” . 112
Table D.2 – Task “Collision avoidance” . 112
Table F.1 – IEC 61162-1 sentences transmitted by the INS . 117
Table F.2 – IEC 61162-1 sentences received by the INS . 118

– 6 – IEC 61924-2:2012 © IEC 2012

Table H.1 – Required results . 122

Table H.2 – Required results . 123

Table H.3 – Required results for dynamic scenario . 123

Table H.4 – Required resolution for test . 123

Table J.1 – Conversion from ALR to ALF . 126

Table J.2 – Conversion from ACN to ACK . 127

Table J.3 – Unique alert identifier at alert source . 134

Table M.1 – Alert management icons – Basic . 146

Table M.2 – Alert management icons – Additional qualifiers . 147

INTERNATIONAL ELECTROTECHNICAL COMMISSION

____________
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

FOREWORD
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5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
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6) All users should ensure that they have the latest edition of this publication.
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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 61924-2 has been prepared by IEC technical committee 80:
Maritime navigation and radiocommunication equipment and systems.
The text of this standard is based on the following documents:
FDIS Report on voting
80/677/FDIS 80/684/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.

– 8 – IEC 61924-2:2012 © IEC 2012

This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

A list of all parts in the IEC 61924 series, published under the general title Maritime

navigation and radiocommunication equipment and systems – Integrated navigation systems,

can be found on the IEC website.

Text in italics signifies that the wording is identical to that of the referenced IMO resolution

and/or the SOLAS convention.
The committee has decided that the contents of this publication will remain unchanged until

the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data

related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
The contents of the corrigendum of November 2013 have been included in this copy.

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.
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

1 Scope
This part of IEC 61924 specifies the minimum requirements for the design, manufacture,
integration, methods of testing and required test results for an integrated navigation system
(INS) to comply with the International Maritime Organization (IMO) requirements of Resolution
MSC.252(83). In addition, it takes account of IMO Resolution A.694(17) to which IEC 60945 is
associated. When a requirement in this standard is different from IEC 60945, the requirement
of this standard takes precedence.
NOTE 1 IEC 61924:2006 specifies the minimum requirements for the design, manufacture, integration, methods
of testing and required test results for an integrated navigation system to comply with the earlier IMO requirements
of Resolution MSC 86(70), Annex 3. Integrated navigation systems in accordance with IEC 61924:2006 are not
suitable for installation after 1 January 2011.
NOTE 2 All text of this standard, whose wording is identical to that in IMO Resolution MSC.252(83) will be printed
in italics and the Resolution and paragraph number indicated between brackets.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and
are indispensable for its application. 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 (all parts), Maritime navigation and radiocommunication equipment and systems –
Digital interfaces
IEC 61162-1:2010, Maritime navigation and radiocommunication equipment and systems –
Digital interfaces – Part 1: Single talker and multiple listeners
IEC 61162-2, Maritime navigation and radiocommunication equipment and systems – Digital
interfaces – Part 2: Single talker and multiple listeners, high-speed transmission
IEC 61162-3, Maritime navigation and radiocommunication equipment and systems – Digital
interfaces – Part 3: Serial data instrument network
IEC 61162-450, Maritime navigation and radiocommunication equipment and systems –
Digital interfaces – Part 450: Multiple talkers and multiple listeners – Ethernet interconnection
IEC 61174:2008, Maritime navigation and radiocommunication equipment and systems –
Electronic chart display and information system (ECDIS) – Operational and performance
requirements, methods of testing and required test results

– 10 – IEC 61924-2:2012 © IEC 2012

IEC 62065:2002, Maritime navigation and radiocommunication equipment and systems –

Track control systems – Operational and performance requirements, methods of testing and

required test results
IEC 62288:2008, 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 62388:2007, Maritime navigation and radiocommunication equipment and systems –

Shipborne radar – Performance requirements, methods of testing and required test results

IEC 62616:2010, Maritime navigation and radiocommunication equipment and systems –
Bridge navigational watch alarm system (BNWAS)
IMO A.694(17), General requirements for shipborne radio equipment forming part of the
Global maritime distress and safety system (GMDSS) and for electronic navigational aids
IMO/ICAO, International Aeronautical and Maritime Search and Rescue Manual (IAMSAR
Manual) Volume 3
IMO MSC/Circ.982, Guidelines on ergonomic criteria for bridge equipment and layout
IMO MSC.191(79), Performance standards for presentation of navigation-related information
on shipborne navigational displays
IMO MSC.232(82), Revised performance standards for Electronic Chart Display and
Information Systems (ECDIS)
IMO MSC.252(83), Performance Standards for Integrated Navigation Systems (INS)
IMO MSC.302(87), Performance standards for Bridge Alert Management (BAM)
ISO 11674:2006, Ships and marine technology – Heading control systems
3 Terms, definitions and abbreviations
3.1 Terms and definitions
For the purposes of this document, the following terms and definitions apply.

3.1.1
accuracy
degree of conformance between the estimated or measured parameter value at a given time
and its true parameter value at that time
3.1.2
added value
functionality and information, which are provided by the INS, in addition to the requirements of
the performance standard for the individual equipment
3.1.3
aggregated alert
alert indicating the existence of multiple individual alerts of the same kind

3.1.4
aid to navigation
AtoN
any device or system external to a vessel intended to assist a navigator to determine position

or safe course, or to warn of hazards to navigation

3.1.5
alarm
the highest priority of an alert as defined in MSC.252(83). Announcing a situation or condition

requiring immediate attention, decision and if necessary action by the bridge team, to
maintain the safe navigation of the ship

3.1.6
alert
announcing abnormal situations and conditions requiring attention, decision and/or action.
Alerts are divided in three priorities: alarms, warnings and cautions
3.1.7
alert announcements
visual and where applicable acoustical presentation of alerts
3.1.8
alert history list
accessible list of past alerts
3.1.9
alert management
concept for the harmonized regulation of the monitoring, handling, distribution and
presentation of alerts on the bridge
3.1.10
announcement
visual and/or audible signal issued to the user by the system
3.1.11
automatic control functions
functions that include automatic heading, and/or track and/or speed control or other
navigation related automatic control functions
3.1.12
backup
use of data, function and/or hardware of similar type and quality

3.1.13
Category A alerts
alerts where graphical e.g. radar, ECDIS, information at the task station directly assigned to
the function generating the alert is necessary, as decision support for the evaluation the alert
related condition
3.1.14
Category B alerts
alerts where no additional information for decision support is necessary besides the
information which can be presented at the central alert management HMI

– 12 – IEC 61924-2:2012 © IEC 2012

3.1.15
caution
lowest priority of an alert. Raising bridge team’s awareness of a condition which does not

warrant an alarm or warning condition, but still requires attention out of the ordinary

consideration of the situation or of given information

3.1.16
collision avoidance
navigational task of detecting and plotting other ships and objects to avoid collisions

3.1.17
configuration in use
sub-systems (e.g. sensors and sources, MFD workstations, automatic control function, etc.)
selected for use and tasks (e.g. collision avoidance, route monitoring, etc.) selected operative
in each MFD
Note 1 to entry: This is a subset of the available configuration which is a subset of the complete system
configuration.
3.1.18
conning position
place on the bridge with a commanding view and which is used by navigators when
commanding, manoeuvring and controlling a ship
3.1.19
consistent common reference point
CCRP
location on own ship, to which all horizontal measurements such as target range, bearing,
relative course, relative speed, closest point of approach (CPA) or time to closest point of
approach (TCPA) are referenced, typically the conning position of the bridge
3.1.20
consistent common reference system
CCRS
sub-system or function of an INS for acquisition, processing, storage, surveillance and
distribution of data and information providing identical and obligatory reference to sub-
systems and subsequent functions within an INS and to other connected equipment, if
available
Note 1 to entry: Examples of reference are: coordinate system, time zone, chart datum and depth datum.
3.1.21
degraded condition
reduction in system functionality resulting from failure
3.1.22
detected hazard
hazard identified by a sensor (for example, radar or echo sounder) or reported by a
communication device (for example AIS or NAVTEX) and which is available to the INS
3.1.23
entry field
location on a display for the input of data by the operator
Note 1 to entry: The requested information is usually alphanumeric.
3.1.24
essential functions
indispensable functions to be available as required for the relevant operational use

3.1.25
essential information
indispensable information to be available as required for the relevant functions

3.1.26
expected precision
deviation between the measured value and the true value that is normally not exceeded by a

typical system
3.1.27
external safety related messages

data received from outside of the ship concerning the safety of navigation, through equipment
listed in SOLAS chapter V and/or NAVTEX
3.1.28
failure analysis
logical, systematic examination of an item, including its diagrams or formulas, to identify and
analyse the probability, causes and consequences of potential and real failures
3.1.29
fallback
use of data, function or hardware
...