SIST EN ISO 9876:2000

SLOVENSKI STANDARD
SIST EN ISO 9876:2000
01-december-2000
Ships and marine technology - Marine facsimile receivers for meteorological
charts (ISO 9876:1997)
Ships and marine technology - Marine facsimile receivers for meteorological charts (ISO
9876:1997)
Schiffe und Meerestechnik - Schiffsfaksimileempfänger für meteorologische Karten (ISO
9876:1997)
Navires et technologie maritime - Récepteurs marins de transmissions par télécopie des
cartes météorologiques (ISO 9876:1997)
Ta slovenski standard je istoveten z: EN ISO 9876:1998
ICS:
47.020.70 Navigacijska in krmilna Navigation and control
oprema equipment
SIST EN ISO 9876:2000 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 9876:2000

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SIST EN ISO 9876:2000

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SIST EN ISO 9876:2000

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SIST EN ISO 9876:2000
INTERNATIONAL
IS0
STANDARD
9876
Second edition
1997-06-I 5
Ships and marine technology -
Marine facsimile receivers for
meteorological charts
Navires et technologie maritime - Mcepteurs marins de transmissions
par t&copie des cartes mMoro/ogiques
Reference number
IS0 9876: 1997(E)

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SIST EN ISO 9876:2000
IS0 9876: 1997(E)
IS0 (the International Organization for Standardization) is a worldwide
federation of national standards bodies (IS0 member bodies). The work of
preparing International Standards is normally carried out through IS0
technical committees. Each member body interested in a subject for which
a technical committee has been established has the right to be
represented on that committee. International organizations, governmental
and non-governmental, in liaison with ISO, also take part in the work. IS0
collaborates closely with the International Electrotechnical Commission
(IEC) on all matters of electrotechnical standardization.
Draft International Standards adopted by the technical committees are
circulated to the member bodies for voting. Publication as an International
Standard requires approval by at least 75 % of the member bodies casting
a vote.
International Standard IS0 9876 was prepared by Technical Committee
ISOmC 8, Ships and marine technology, Subcommittee SC 6, Navigation.
This second edition cancels and replaces the first edition (IS0 9876:1987),
which has been technically revised.
0 IS0 1997
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 the publisher.
International Organization for Standardization
Case postale 56 l CH-1211 Get-We 20 l Switzerland
Internet central @ iso.ch
x.400 c=ch; a=400net; p=iso; o=isocs; s=central
Printed in Switzerland
ii

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SIST EN ISO 9876:2000
IS0 9876: 1997(E)
INTERNATIONAL STANDARD @ IS0
Marine facsimile receivers
Ships and marine technology -
for meteorological charts
1 Scope
This International Standard specifies the construction, performance, type testing and inspection for a shipborne
marine facsimile receiver that receives meteorological charts transmitted by “Facsimile transmission of
meteorological chart over radio circuits” stated in accordance with Recommendation 343-l of the International Radio
Consultative Committee (CCIR) and Document No. 386, Part 111-7, specified by the World Meteorological
Organization (WMO).
This International Standard applies to shipborne radio facsimile receivers for the reception of meteorological charts
and other graphical representation of meteorological conditions intended as an aid to navigation at sea.
2 Normative references
The following standards contain provisions which, through reference in this text, constitute provisions of this
International Standard. At the time of publication, the editions indicated were valid. All standards are subject to
revision, and parties to agreements based on this International Standard are encouraged to investigate the
possibility of applying the most recent editions of the standards indicated below. Members of IEC and IS0 maintain
registers of currently valid International Standards.
ISO/R 694:1968, Positioning of magnetic compasses in ships.
IEC 9451994, Marine navigational equipment - General requirements - Methods of testing and required test
results.
Recommendation 343-l :I 984, Facsimile transmission of
International Radio Consultative Committee,
meteorological chatis over radio circuits.
Technical characteristics of equipment for meteorological facsimile (analogue) transmissions No. 386,
Part Ill-7:1986, World Meteorological Organization.
3 Definitions
For the purposes of this International Standard, the following definitions apply.
3.1 dead sector: Part of scanning line unavailable for picture signal transmissions the criteria of which are within
4,5 % + 0,5 % of the length.
3.2 facsimile: Process, or the result of the process, by which fixed graphic charts are scanned and the information
is converted to electric signals which are used remotely to produce a copy of the chart in record form.

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SIST EN ISO 9876:2000
IS0 9876: 1997(E)
3.3 index of cooperation (IOC): The value of the index of cooperation, M, is defined as follows:
M = LFlp
where
L is the length of the scanning line, in centimetres;
F is the density of the scanning line, in reciprocal centimetres.
3.4 IOC selection signal: Signal for automatic IOC selection in the facsimile receiver which is accomplished by
transmission of alternating black and white signals lasting for 5 s to 10 s with the following frequencies:
300 Hz for IOC 576
675 Hz for IOC 288 (or IOC 576 with alternate line scanning)
NOTES
1 This signal is also used for automatic starting of the receiver.
2 The envelopes of the signal are approximately rectangular.
3.5 meteorological chart: Chart portraying the state of the weather, such as weather conditions, wind force and
direction, high or low atmospheric pressure, weather front and isobar, at a particular time over a wide area.
phasing: Adjusting the phase of the independent synchronous power source so as to be able to receive the
3.6
weather chart in its correct position.
phasing signal: Signal for automatically phasing the facsimile receiver is accomplished by a 30 s transmission
3.7
of alternating, black and white signals with the following frequencies:
1 Hz for 60 lines per minute (60 r/min)
I,5 Hz for 90 lines per minute (90 r/min)
2 Hz for 120 lines per minutes (120 r/min)
NOTES
1 This signal may be also used for automatic starting, automatic selection of scanning frequency and automatic adjustment of
recording levels.
2 The wave form of this signal is either symmetrical, i.e. black and white, each lasting half the scanning line, or symmetrical
with the white lasting for 5 % and black for 95 % of the scanning line.
3.8 remote control signal: Control signal for operating the apparatus from a distance.
NOTE - The remote control signals for operating the facsimile receiver for meteorological charts include the phasing signal,
the IOC selection signal and stop signal.
3.9 SND/N: Value of signal plus noise plus distortion to noise ratio.
SND/ND: Value of signal plus noise plus distortion to noise plus distortion ratio.
3.10
3.11 spurious responses: Ratio of the input level of an unwanted signal, at the frequency of the spurious
response to the input level of a wanted signal, when the wanted and unwanted signals individually produce the
same SND/N or SND/ND ratio at the receiver output.
3.12 stop signal: Transmission of 5 s of alternating black and white signals at 450 Hz, followed by 10 s of signal
corresponding to continuous black.
NOTE - The envelopes of the 450 Hz signals are approximately rectangular.

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SIST EN ISO 9876:2000
@ IS0 IS0 9876:1997(E)
4 Requirements
4.1 Construction
The equipment shall comprise a radio receiver and a recording unit.
4.1.1
4.1.2 The recording unit shall be so constructed as to allow for the change of recording paper and either or both
recording stylus during day and subdued artificial light. It should be possible to effect routine maintenance under the
same conditions.
4.2 Performance standards for recording unit
4.2.1 Recording unit
The equipment shall be capable of continuous recording whilst transmissions are being received.
4.2.2 Input signals
The recording unit shall accept input signals from an external receiver in the audio frequency range at an input level
of at least - 10 dBm to + 10 dBm and shifts of + 150 Hz and/or & 400 Hz about a centre frequency of 1 900 Hz at an
impedance of 600 Sz.
4.2.3 index of cooperation (IOC)
Automatic or manual operation at an index of cooperation of 576 and 288 shall be possible.
4.2.4 Scanning speeds
The recording unit shall be capable of the automatic and manual selection of scanning speeds of 60, 90 and 120
scans per minute.
4.2.5 Automatic operation
The recording unit shall automatically respond to control signals of 300 Hz and 675 Hz modulation of the carrier
...