SIST EN 61996-1:2014

Maritime navigation and radiocommunication equipment and systems - Shipborne voyage data recorder (VDR) - Part 1: Voyage data recorder (VDR) - Performance requirements, methods of testing and required test results

This part of IEC 61996 specifies the minimum performance requirements, technical characteristics, methods of testing and required test results, for shipborne voyage data recorder (VDR) installations as required by Chapter V of the International Convention for Safety of Life at Sea (SOLAS), as amended. It takes account of IMO resolution A.694(17) and is associated with IEC 60945. When a requirement in this standard is different from IEC 60945, the requirement in this standard takes precedence. This standard incorporates the applicable parts of the performance standards included in IMO Resolution MSC.333(90).

Navigations- und Funkkommunikationsgeräte und -systeme für die Seeschifffahrt - Fahrtdatenaufzeichnungsgeräte (VDR) auf Seeschiffen - Teil 1: Fahrtdatenaufzeichnungsgerät (VDR) - Leistungsanforderungen, Prüfverfahren und geforderte Prüfergebnisse

Matériels et systèmes de navigation et de radiocommunication maritimes - Enregistreurs des données du voyage (VDR) de bord - Partie 1: Enregistreur des données du voyage (VDR) - Exigences de fonctionnement, méthodes d'essai et résultats d'essai exigés

L'IEC 61996-1:2013 spécifie les exigences de performance, caractéristiques techniques et méthodes d'essai minimales ainsi que les résultats d'essai exigés pour les enregistreurs des données du voyage (VDR) de bord, comme exigé par le Chapitre V de la Convention internationale pour la sauvegarde de la vie humaine en mer (SOLAS – International Convention for the Safety of Life at Sea) telle qu'amendée. Elle prend en compte la Résolution A.694(17) de l'OMI et est associée à l'IEC 60945. Lorsqu'une exigence de la présente norme diverge de l'IEC 60945, l'exigence de la présente norme prévaut.
La présente norme incorpore les parties applicables des normes de fonctionnement incluses dans la Résolution MSC.333(90) de l'OMI.
Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
a) La description de la capsule de protection en 4.3.4 a été modifiée conformément aux exigences des nouvelles normes de fonctionnement de l'OMI données dans la Résolution MSC.333(90) qui exigent maintenant un support d'enregistrement final composé de trois parties; fixe, flottante et à long terme.
b) Une nouvelle exigence pour un essai de fonctionnement a été ajoutée en 4.3.6.
c) D'autres éléments de données à enregistrer ont été ajoutés à 4.6 pour l'ECDIS, l'AIS, le mouvement de roulis et les journaux de bord électroniques.
d) L'Article 5 contient de nouvelles exigences techniques relatives aux données de configuration, à l'essai de fonctionnement opérationnel et au système de gestion des alertes à la passerelle. De plus, d'autres exigences techniques ont été ajoutées en 5.6 pour l'audio de la passerelle et en 5.8 pour les images radar et d'ECDIS.
e) Les références aux exigences en matière d'"alarme" dans l'édition précédente ont été remplacées par des références aux "précautions" conformément aux recommandations de l'OMI. Les méthodes d'essai dans l'Article 6 ont été mises à jour pour refléter les nouvelles exigences.
f) Les nouvelles Annexes E, F et G concernant les protocoles d'interfaçage des images à l'aide d'un réseau local ont été ajoutées.

Pomorska navigacijska in radiokomunikacijska oprema - Ladijski zapisovalnik podatkov o plovbi ("ladijska črna skrinjica") (VDR) - 1. del: Zapisovalnik podatkov o plovbi (VDR) - Tehnične zahteve, metode preskušanja in zahtevani rezultati preskusov (IEC 61996-1:2013)

Ta del standarda IEC 61996 določa minimalne zahteve za delovanje, tehnične zahteve, metode preskušanja in zahtevane rezultate preskusov za ladijski zapisovalnik podatkov o plovbi (»ladijska črna skrinjica«) (VDR) v skladu s V. poglavjem spremenjene Mednarodne konvencije o varstvu človeškega življenja na morju (SOLAS). Standard upošteva sklep A.694(17) Mednarodne pomorske organizacije in se navezuje na standard IEC 60945. Če se zahteva iz tega standarda razlikuje od zahteve iz standarda IEC 60945, velja zahteva iz tega standarda. Ta standard vključuje ustrezne dele standardov za delovanje, ki so zajeti v sklepu MSC.333(90) Mednarodne pomorske organizacije.

General Information

• Status: Published
• Publication Date: 09-Apr-2014
• ICS: 47.020.70 - Navigation and control equipment
• Technical Committee: I11 - Imaginarni 11
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 25-Mar-2014
• Due Date: 30-May-2014
• Completion Date: 10-Apr-2014
• Directive: TP028 - Pravilnik o obveznih pregledih za varno izvajanje linijskih prevozov z ro-ro trajekti in hitrimi potniškimi plovili
• Ref Project: EN 61996-1:2013 - Maritime navigation and radiocommunication equipment and systems - Shipborne voyage data recorder (VDR) - Part 1: Performance requirements, methods of testing and required test results

Relations

• Replaces: SIST EN 61996-1:2008 - Maritime navigation and radiocommunication equipment and systems - Shipborne voyage data recorder (VDR) -- Part 1: Voyage data recorder (VDR) - Performance requirements, methods of testing and required test results
• Effective Date: 19-Jun-2012
• Replaces: SIST EN 61996-1:2008 - Maritime navigation and radiocommunication equipment and systems - Shipborne voyage data recorder (VDR) -- Part 1: Voyage data recorder (VDR) - Performance requirements, methods of testing and required test results
• Effective Date: 29-Jan-2023
• Revised: SIST EN 61996-1:2008 - Maritime navigation and radiocommunication equipment and systems - Shipborne voyage data recorder (VDR) -- Part 1: Voyage data recorder (VDR) - Performance requirements, methods of testing and required test results
• Effective Date: 06-May-2014
• Corrected By: SIST EN 61996-1:2014/AC:2016 - Maritime navigation and radiocommunication equipment and systems - Shipborne voyage data recorder (VDR) - Part 1: Performance requirements, methods of testing and required test results
• Effective Date: 01-May-2016
• Amended By: SIST EN 61996-1:2014/A1:2021 - Maritime navigation and radiocommunication equipment and systems - Shipborne voyage data recorder (VDR) - Part 1: Performance requirements, methods of testing and required test results (IEC 61996-1:2013/A1:2021)
• Effective Date: 13-Oct-2020
• Replaces: SIST EN 61996-1:2008 - Maritime navigation and radiocommunication equipment and systems - Shipborne voyage data recorder (VDR) -- Part 1: Voyage data recorder (VDR) - Performance requirements, methods of testing and required test results
• Effective Date: 07-Jun-2022

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN 61996-1:2014
01-maj-2014
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SIST EN 61996-1:2008
3RPRUVNDQDYLJDFLMVNDLQUDGLRNRPXQLNDFLMVNDRSUHPD/DGLMVNL]DSLVRYDOQLN
SRGDWNRYRSORYELODGLMVNDþUQDVNULQMLFD9'5GHO=DSLVRYDOQLNSRGDWNRY
RSORYEL9'57HKQLþQH]DKWHYHPHWRGHSUHVNXãDQMDLQ]DKWHYDQLUH]XOWDWL
SUHVNXVRY,(&
Maritime navigation and radiocommunication equipment and systems - Shipborne
voyage data recorder (VDR) - Part 1: Voyage data recorder (VDR) - Performance
requirements, methods of testing and required test results
Navigations- und Funkkommunikationsgeräte und -systeme für die Seeschifffahrt -
Fahrtdatenaufzeichnungsgeräte (VDR) auf Seeschiffen - Teil 1:
Fahrtdatenaufzeichnungsgerät (VDR) - Leistungsanforderungen, Prüfverfahren und
geforderte Prüfergebnisse
Matériels et systèmes de navigation et de radiocommunication maritimes - Enregistreurs
des données du voyage (VDR) de bord - Partie 1: Enregistreur des données du voyage
(VDR) - Exigences de fonctionnement, méthodes d'essai et résultats d'essai exigés
Ta slovenski standard je istoveten z: EN 61996-1:2013
ICS:
47.020.70 Navigacijska in krmilna Navigation and control
oprema equipment
SIST EN 61996-1:2014 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 61996-1:2014

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SIST EN 61996-1:2014

EUROPEAN STANDARD
EN 61996-1

NORME EUROPÉENNE
July 2013
EUROPÄISCHE NORM

ICS 47.020.70 Supersedes EN 61996-1:2008

English version


Maritime navigation and radiocommunication equipment and systems -
Shipborne voyage data recorder (VDR) -
Part 1: Performance requirements, methods of testing and required test
results
(IEC 61996-1:2013)

Matériels et systèmes de navigation et de Navigations- und
radiocommunication maritimes - Funkkommunikationsgeräte und -systeme
Enregistreurs des données du voyage für die Seeschifffahrt -
(VDR) de bord - Fahrtdatenaufzeichnungsgeräte (VDR) auf
Partie 1: Exigences de fonctionnement, Seeschiffen -
méthodes d'essai et résultats d'essai Teil 1: Fahrtdatenaufzeichnungsgerät
exigés (VDR) -
(CEI 61996-1:2013) Leistungsanforderungen, Prüfverfahren
und geforderte Prüfergebnisse
(IEC 61996-1:2013)


This European Standard was approved by CENELEC on 2013-06-27. CENELEC members are bound to comply
with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard
the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the CEN-CENELEC Management Centre or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CENELEC member into its own language and notified
to the CEN-CENELEC Management Centre has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus,
the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany,
Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland,
Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Management Centre: Avenue Marnix 17, B - 1000 Brussels


© 2013 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61996-1:2013 E

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SIST EN 61996-1:2014
EN 61996-1:2013 - 2 -

Foreword
The text of document 80/690/FDIS, future edition 2 of IEC 61996-1, prepared by IEC/TC 80 "Maritime
navigation and radiocommunication equipment and systems" was submitted to the IEC-CENELEC
parallel vote and approved by CENELEC as EN 61996-1:2013.
The following dates are fixed:
• latest date by which the document has (dop) 2014-03-27
to be implemented at national level by
publication of an identical national
standard or by endorsement
(dow) 2016-06-27
• latest date by which the national
standards conflicting with the

document have to be withdrawn

This document supersedes EN 61996-1:2008.
EN 61996-1:2013 includes the following significant technical changes with respect to EN 61996-1:2008:
a) The description of the protective capsule in 4.3.4 has been changed in line with the requirements of the
new IMO performance standards given in Resolution MSC.333(90) which now require a final recording
medium comprising three parts; fixed, float-free and long-term.
b) A new requirement for a performance test has been added in 4.3.6.
c) Further data items to be recorded have been added to 4.6 for ECDIS, AIS, rolling motion and electronic
logbooks.
d) Clause 5 contains new technical requirements for configuration data, operational performance test and
bridge alert management system. In addition, further technical requirements have been added to 5.6 for
bridge audio and to 5.8 for radar and ECDIS images.
e) References to “alarm” requirements in the previous edition have been substituted by references to
“cautions” in line with current IMO recommendations. The test methods in Clause 6 have been updated to
reflect the new requirements.
f) New Annexes E, F and G concerning protocols for interfacing images using a Local Area Network have
been added.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such patent
rights.
Endorsement notice
The text of the International Standard IEC 61996-1:2013 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards indicated:
IEC 60268-5 NOTE  Harmonised as EN 60268-5.
IEC 61162-1 NOTE  Harmonised as EN 61162-1.
IEC 61924-2 NOTE  Harmonised as EN 61924-2.
IEC 62065 NOTE  Harmonised as EN 62065.
IEC 62288 NOTE  Harmonised as EN 62288.
ISO 8728 NOTE  Harmonised as EN ISO 8728.
ISO 11674 NOTE  Harmonised as EN ISO 11674.

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SIST EN 61996-1:2014
- 3 - EN 61996-1:2013
Annex ZA
(normative)

Normative references to international publications
with their corresponding European publications

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.

NOTE  When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.

Publication Year Title EN/HD Year

IEC 60068-2-27 2008 Environmental testing - EN 60068-2-27 2009
Part 2-27: Tests - Test Ea and guidance:
Shock


IEC 60268-16 - Sound system equipment - EN 60268-16 -
Part 16: Objective rating of speech
intelligibility by speech transmission index


IEC 60945 - Maritime navigation and radiocommunication EN 60945 -
equipment and systems - General
requirements - Methods of testing and
required test results


IEC 61097-2 - Global maritime distress and safety system - -
(GMDSS) -
Part 2: COSPAS-SARSAT EPIRB - Satellite
emergency position indicating beacon
operating on 406 MHz - Operational and
performance requirements, methods of testing
and required test results


IEC 61097-7 1996 Global maritime distress and safety system - -
(GMDSS) -
Part 7: Shipborne VHF radiotelephone
transmitter and receiver - Operational and
performance requirements, methods of testing
and required test results


IEC 61162 Series Maritime navigation and radiocommunication EN 61162 Series
equipment and systems - Digital interfaces


IEC 61162-450 2011 Maritime navigation and radiocommunication EN 61162-450 2011
equipment and systems - Digital interfaces -
Part 450: Multiple talkers and multiple
listeners - Ethernet interconnection


IEC 61174 - Maritime navigation and radiocommunication EN 61174 -
equipment and systems - Electronic chart
display and information system (ECDIS) -
Operational and performance requirements,
methods of testing and required test results


IEC 61260 1995 Electroacoustics - Octave-band and fractional-EN 61260 1995
+ A1 2001 octave-band filters + A1 2001


IEC 61672-1 2002 Electroacoustics - Sound level meters - EN 61672-1 2003
Part 1: Specifications


IEC 62388 2007 Maritime navigation and radio-communication EN 62388 2008
equipment and systems - Shipborne radar -
Performance requirements, methods of testing
and required test results

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SIST EN 61996-1:2014
EN 61996-1:2013 - 4 -
Publication Year Title EN/HD Year
IMO A.658(16) - Use and fitting of retro-reflective materials on - -
life-saving appliances


IMO A.662(16) - Performance standards for float-free release - -
and activation arrangements for emergency
radio equipment


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 A.810(19) - Performance standards for float-free satellite - -
emergency position-indicating radio beacons
(EPIRBs) operating on 406 MHz


IMO A.1021(26) - Code on alerts and indicators - -


IMO MSC.333(90) 2012 Performance standards for shipborne Voyage - -
Data Recorders (VDRs)


EUROCAE ED-112 2003 Minimum operational performance - -
specification (MOPS) for crash protected
airborne recorder systems


VESA 2007 Video electronics standards association – - -
VESA and industry standards and guidelines
for computer display monitor timing (DMT)


SAE AS8045A 2011 Engineering Society for advancing mobility - -
land sea air and space – Minimum
performance standard for underwater locating
devices – Acoustic, self-powered

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SIST EN 61996-1:2014



IEC 61996-1

®


Edition 2.0 2013-05




INTERNATIONAL



STANDARD



















Maritime navigation and radiocommunication equipment and systems –

Shipborne voyage data recorder (VDR) –

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

























INTERNATIONAL

ELECTROTECHNICAL

COMMISSION

PRICE CODE
XC


ICS 47.020.70 ISBN 978-2-83220-799-4



  Warning! Make sure that you obtained this publication from an authorized distributor.


® Registered trademark of the International Electrotechnical Commission

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SIST EN 61996-1:2014
– 2 – 61996-1 © IEC:2013(E)
CONTENTS
FOREWORD . 6
1 Scope . 8
2 Normative references . 8
3 Terms, definitions and abbreviations . 9
3.1 Terms and definitions . 9
3.2 Abbreviations . 12
4 Performance requirements . 12
4.1 General . 12
4.2 Purpose . 12
4.3 Operational requirements . 12
4.3.1 Design and construction . 12
4.3.2 Maintenance of sequential records . 13
4.3.3 Co-relation in date and time . 13
4.3.4 Final recording medium . 13
4.3.5 Interfaces . 14
4.3.6 Performance test . 15
4.4 Data selection and security . 15
4.4.1 Selection of data items . 15
4.4.2 Configuration data . 15
4.4.3 Resistance to tampering . 16
4.4.4 Recording integrity . 16
4.5 Operation . 17
4.5.1 Recording and saving of data . 17
4.5.2 Power source . 17
4.5.3 Dedicated reserve power source . 17
4.5.4 Recording period and duration . 17
4.6 Data items to be recorded . 17
4.6.1 Date and time . 17
4.6.2 Ship’s position . 18
4.6.3 Speed . 18
4.6.4 Heading . 18
4.6.5 Bridge audio . 18
4.6.6 Communications audio . 18
4.6.7 Radar data – post-display selection . 18
4.6.8 ECDIS . 19
4.6.9 Echo sounder . 19
4.6.10 Main alarms . 19
4.6.11 Rudder order and response . 19
4.6.12 Engine and thruster order and response . 19
4.6.13 Hull openings (doors) status . 19
4.6.14 Watertight and fire door status . 20
4.6.15 Accelerations and hull stresses . 20
4.6.16 Wind speed and direction . 20
4.6.17 AIS . 20
4.6.18 Rolling motion . 20
4.6.19 Configuration data . 20
4.6.20 Electronic logbook . 20

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SIST EN 61996-1:2014
61996-1 © IEC:2013(E) – 3 –
5 Technical characteristics . 21
5.1 Co-relation in date and time . 21
5.2 Particular design requirements for the final recording medium . 21
5.2.1 Fixed protective capsule . 21
5.2.2 Float-free capsule . 21
5.2.3 Long-term recording medium . 21
5.3 Location beacons. 22
5.3.1 Fixed protective capsule . 22
5.3.2 Float-free capsule . 22
5.4 Survivability of recorded data . 22
5.4.1 Long-term retention . 22
5.4.2 Physical protection . 22
5.5 Information to be included in the manufacturer’s documentation . 23
5.5.1 Installation guidelines. 23
5.5.2 Operation and maintenance manual . 24
5.5.3 Information for use by an investigation authority . 24
5.6 Bridge audio specifications . 24
5.6.1 Input interface . 24
5.6.2 Reference signal . 24
5.6.3 Audio frequency response . 25
5.6.4 Quality index . 25
5.6.5 Signal noise level – Signal to noise and distortion . 25
5.6.6 Ability to handle complex signals . 25
5.6.7 Suppression of low frequency out band noise . 26
5.6.8 Microphones . 26
5.7 Communications audio. 26
5.7.1 Input interfaces . 26
5.7.2 Reference signal . 26
5.7.3 Audio frequency response . 26
5.7.4 Quality index . 26
5.7.5 Audio noise level – Signal to no signal . 27
5.7.6 Signal noise level – Signal to noise and distortion (SINAD) . 27
5.8 Screen image capture . 27
5.8.1 Input interface . 27
5.8.2 Image outputs . 28
5.9 Radar data – Post-display selection . 28
5.10 ECDIS data . 28
5.11 Configuration data . 29
5.11.1 Distribution of data in final recording media . 29
5.11.2 Protection . 29
5.11.3 Synchronisation of sensor and configuration data . 29
5.12 Operational performance test . 29
5.13 Bridge alert management system . 29
6 Methods of testing and required test results . 29
6.1 General . 29
6.1.1 Test setup . 29
6.1.2 Download and playback equipment . 30
6.1.3 Sequence of tests . 31
6.1.4 Requirements to be checked by inspection only . 31

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SIST EN 61996-1:2014
– 4 – 61996-1 © IEC:2013(E)
6.1.5 Environmental test conditions for normal operation . 31
6.1.6 Recording duration . 32
6.1.7 Reserve power source . 32
6.1.8 Recharging of reserve source of power . 33
6.1.9 Brief interruption of electrical power . 33
6.1.10 Recording integrity . 33
6.1.11 Maintenance of sequential records . 34
6.1.12 Co-relation in date and time . 34
6.1.13 Design and construction of the fixed protective capsule . 34
6.1.14 Design and construction of the float-free capsule . 36
6.1.15 Operational performance test . 37
6.1.16 Power source . 38
6.2 Data items to be recorded . 38
6.2.1 Date/time – Ship’s position – Speed – Heading. 38
6.2.2 Bridge audio . 38
6.2.3 Communications audio . 44
6.2.4 Radar data, post-display selection and ECDIS . 47
6.2.5 Other items . 55
6.2.6 Electronic logbook . 56
6.3 Interfaces . 56
Annex A (normative) IEC 61162 sentence formats . 57
Annex B (informative) Mandatory alarms . 58
Annex C (normative) Download and playback equipment for investigating authorities . 61
Annex D (informative) Requirement/test – Cross-references . 65
Annex E (normative) LAN image protocol . 67
Annex F (informative) Network for image transmission . 71
Annex G (normative) ECDIS display source information . 74
Bibliography . 79

Figure 1 – Insertion of Morse letter “V” in homing transmission . 22
Figure 2 – Test set-up block diagram . 49
Figure 3 – Comparison of images . 53
Figure F.1 – Network with a switch . 71
Figure F.2 – Network with direct connections . 72
Figure F.3 – Network for a ship with an extensive bridge. 73

Table 1 – Bridge audio, signal to no signal measurements . 41
Table 2 – Bridge audio, signal to noise and distortion (SINAD) measurements . 42
Table 3 – Complex signals . 43
Table 4 – Communications audio, signal to no-signal measurements . 46
Table 5 – Communications audio, signal to noise and distortion (SINAD) measurements . 47
Table 6 – Intersection colours of test images 1 and 2 . 51
Table A.1 – References in this standard . 57
Table B.1 – Mandatory alarms on the bridge . 58
Table D.1 – Subject list and subclauses (1 of 2) . 65
Table E.1 – Default values for transmitting equipment . 70

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SIST EN 61996-1:2014
61996-1 © IEC:2013(E) – 5 –
Table E.2 – Default values for receiving equipment . 70
Table G.1 – Required chart information . 75
Table G.2 – Additional chart information . 75

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SIST EN 61996-1:2014
– 6 – 61996-1 © IEC:2013(E)
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

MARITIME NAVIGATION AND RADIOCOMMUNICATION
EQUIPMENT AND SYSTEMS –
SHIPBORNE VOYAGE DATA RECORDER (VDR) –

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

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees
...