IEC PAS 61162-103:2021

IEC PAS 61162-103 ®
Edition 1.0 2021-04
PUBLICLY AVAILABLE
SPECIFICATION
PRE-STANDARD
Maritime navigation and radiocommunication equipment and systems – Digital
interfaces –
Part 103: Single talker and multiple listeners – New and amended sentences and
Talker IDs
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.

IEC Central Office Tel.: +41 22 919 02 11
3, rue de Varembé info@iec.ch
CH-1211 Geneva 20 www.iec.ch
Switzerland
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigendum or an amendment might have been published.

IEC publications search - webstore.iec.ch/advsearchform IEC online collection - oc.iec.ch
The advanced search enables to find IEC publications by a Discover our powerful search engine and read freely all the
variety of criteria (reference number, text, technical publications previews. With a subscription you will always
committee, …). It also gives information on projects, replaced have access to up to date content tailored to your needs.
and withdrawn publications.
Electropedia - www.electropedia.org
IEC Just Published - webstore.iec.ch/justpublished
The world's leading online dictionary on electrotechnology,
Stay up to date on all new IEC publications. Just Published
containing more than 22 000 terminological entries in English
details all new publications released. Available online and
and French, with equivalent terms in 18 additional languages.
once a month by email.
Also known as the International Electrotechnical Vocabulary

(IEV) online.
IEC Customer Service Centre - webstore.iec.ch/csc

If you wish to give us your feedback on this publication or
need further assistance, please contact the Customer Service
Centre: sales@iec.ch.
IEC PAS 61162-103 ®
Edition 1.0 2021-04
PUBLICLY AVAILABLE
SPECIFICATION
PRE-STANDARD
Maritime navigation and radiocommunication equipment and systems – Digital

interfaces –
Part 103: Single talker and multiple listeners – New and amended sentences and

Talker IDs
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.060 ISBN 978-2-8322-9598-4

– 2 – IEC PAS 61162-103:2021  IEC 2021
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 New content to IEC 61162-1 . 6
2.1 Field definitions . 6
2.2 Approved sentences . 6
2.2.1 DDC – Display dimming control . 6
2.2.2 EPM – Command or report long equipment property value. 9
2.2.3 NLS – Navigation light status . 11
2.2.4 SEL – Selection report . 12
2.2.5 SLM – Steering location/mode . 12
2.2.6 VBC – Water-referenced and ground-referenced docking log speed data . 14
Bibliography . 15

Table 1 – Talker identifier mnemonics . 6

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
MARITIME NAVIGATION AND RADIOCOMMUNICATION
EQUIPMENT AND SYSTEMS – DIGITAL INTERFACES –

Part 103: Single talker and multiple listeners –
New and amended sentences and Talker IDs

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.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence between
any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
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.
A PAS is a technical specification not fulfilling the requirements for a standard, but made
available to the public.
IEC PAS 61162-103 has been processed by IEC technical committee 80: Maritime navigation
and radiocommunication equipment and systems.
The text of this PAS is based on the This PAS was approved for
following document: publication by the P-members of the
committee concerned as indicated in
the following document
Draft PAS Report on voting
80/985/DPAS 80/992/RVDPAS
Following publication of this PAS, which is a pre-standard publication, the technical committee
or subcommittee concerned may transform it into an International Standard.

– 4 – IEC PAS 61162-103:2021  IEC 2021
This PAS shall remain valid for an initial maximum period of 2 years starting from the publication
date. The validity may be extended for a single period up to a maximum of 2 years, at the end
of which it shall be published as another type of normative document, or shall be withdrawn.

INTRODUCTION
This document is circulated as an IEC Publicly Available Specification (IEC/PAS). This agreed
process allows the new information needed to implement new sentences in a shorter time-scale
than revising the appropriate international standards. This document provides information on
th
sentences to support more functionality than available in the published 5 edition of
IEC 61162-1.
This PAS has been developed in conjunction with the IEC TC 80 WG6 and the NMEA.
This PAS will be replaced at a future date by, or be included within, a revision of IEC 61162-1.

– 6 – IEC PAS 61162-103:2021  IEC 2021
MARITIME NAVIGATION AND RADIOCOMMUNICATION
EQUIPMENT AND SYSTEMS – DIGITAL INTERFACES –

Part 103: Single talker and multiple listeners –
New and amended sentences and Talker IDs

1 Scope
IEC 61162-1:2016 supports the transfer of data between various equipment. This document
specifies more equipment Talker IDs, amends existing sentences and introduce new sentences
to facilitate more functionality between equipment.
2 New content to IEC 61162-1
2.1 Field definitions
Additional field definitions are indicated in Table 1.
Table 1 – Talker identifier mnemonics
Talker device Identifier
Automation – Alarm and monitoring system JA
Automation – Reefer monitoring system JB
Automation – Power management system JC
Automation – Propulsion control system JD
Automation – Engine control console JE
Automation – Propulsion boiler JF
Automation – Auxiliary boiler JG
Automation – Electronic governor system JH
Night vision NV
Electronic record book RB
Rudder angle indicator RI
Steering control system/device SC
System managament SM
Track control system TC
2.2 Approved sentences
2.2.1 DDC – Display dimming control
The DDC sentence provides controls for equipment display dimming presets. display brightness
percentage and selection of colour palette.
Transmitting and receiving equipment may support unidirectional or bidirectional
communications as determined by the manufacturer.

When this sentence is sent as a command and not supported or not accepted by the recipient,
the receiving equipment may generate a NAK sentence response providing an appropriate
"reason code". Additionally the receiving equipment may generate a DDC status report
sentence which provides the current dimming state of the receiving equipment.
NOTE The following luminance values are the preferred values to allow uniform dimming with one DDC transmitter,
without the need to pre-compute and store a brightness and colour palette value for every display in a multi-display
system. These values are in conformance with IEC 62288 Presentation of navigation-related information on
shipborne navigational displays (ECDIS colour brightness requirements). A device with a monochrome display may
adjust its display brightness to respect the colour palette selection, to match the luminance of a device with a colour
display for each selected colour palette. The value 49, center position on the brightness scale, represents the
calibrated position for calibrated displays.
D = Day time setting, with a luminance of the brightest colour of 80 cd/m at brightness percentage value 49
K = Dusk setting, with a luminance of the brightest colour of 36 cd/m at brightness percentage value 49
N = Night time setting, with a luminance of the brightest colour of 5 cd/m at brightness percentage value 49
O = Non-luminous setting, without luminance at any brightness percentage value
$--DDC,a,xx,a,a,a*hh
5)
Command mode
4)
Sentence status flag
3)
Colour palette
2)
Brightness percentage 00 to 99
1)
Display dimming preset
Comments:
1) The display dimming preset field contains an indicator that may be associated with a preset dimmed level
consisting of both brightness and colour palette in the receiving equipment.
D = Day time setting
K = Dusk setting
N = Night time setting
O = Non-luminous (i.e.backlighting off) setting
Actual display brightness levels for the display dimming preset indicators above are dependant upon the
capabilities provided by the manufacturer of the equipment. Upon receipt of the DDC sentence, the device shall
switch its display brightness and may switch to the preset value the operator or manufacturer had determined for
the corresponding indicator value. If the equipment had no brightness or dimming preset capability this field would
be ignored.
NOTE 1 If the receiving equipment has preset capability and this field contains a valid value the content of
separate brightness percentage and colour palette fields transmitted within the same sentence can be ignored
by the receiving equipment.
NOTE 2 If the receiving equipment has no preset capability a DDC transmitting device can populate brightness
and palette fields to use the brightness percentage and colour pa
...