ISO 14859:2012
(Main)Ships and marine technology - Sound reception systems
Ships and marine technology - Sound reception systems
This International Standard specifies the functional requirements and recommended installation and performance tests for sound reception systems. Guidelines have been drawn up for the methods and solutions to meet the functional requirements. The requirements apply to fully enclosed bridges, and other bridges where such equipment is voluntarily installed. This International Standard specifies bridge requirements that will secure a safe and efficient lookout on those seagoing ships having a fully enclosed bridge. This International Standard will be for the design of ship bridges. It will also be useful for a) specifiers and procurers of ships and bridge equipment, and b) operators and owners for ensuring that changes made through the life of a ship still conform to its requirements.
Navires et technologie maritime — Systèmes de réception sonore
General Information
Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 14859
First edition
2012-04-01
Ships and marine technology — Sound
reception systems
Navires et technologie maritime — Systèmes de réception sonore
Reference number
©
ISO 2012
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ii © ISO 2012 – All rights reserved
Contents Page
Foreword .iv
Introduction . v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Functional requirements . 2
4.1 General . 2
4.2 Installation recommendations . 3
5 Type tests . 3
5.1 General . 3
5.2 Shipboard type testing . 4
5.3 Test facility type testing . 4
6 Installation performance tests . 5
6.1 Microphone installation . 5
6.2 Bridge equipment installation . 5
6.3 Operational performance . 5
Annex A (informative) Shipboard type test methodology . 6
Annex B (informative) Test facility type test methodology . 8
Bibliography . 11
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
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. ISO collaborates closely with the International
Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. 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.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 14859 was prepared by Technical Committee ISO/TC 8, Ships and marine technology, Subcommittee
SC 6, Navigation and ship operations.
iv © ISO 2012 – All rights reserved
Introduction
Sound reception systems are acoustical-electronic navigational aids to enable the officer of the watch to hear
outside sound signals inside a totally enclosed bridge in order to perform the lookout function as required in
the International Regulations for Preventing Collisions at Sea, 1972. Optionally, they can also be installed on
vessels without fully enclosed bridges.
The requirements in this International Standard take into account human factors, ergonomic principles, and
advances in technology.
INTERNATIONAL STANDARD ISO 14859:2012(E)
Ships and marine technology — Sound reception systems
1 Scope
This International Standard specifies the functional requirements and recommended installation and
performance tests for sound reception systems. Guidelines have been drawn up for the methods and solutions
to meet the functional requirements.
The requirements apply to fully enclosed bridges, and other bridges where such equipment is voluntarily installed.
This International Standard specifies bridge requirements that will secure a safe and efficient lookout on those
seagoing ships having a fully enclosed bridge.
This International Standard will be for the design of ship bridges. It will also be useful for
a) specifiers and procurers of ships and bridge equipment, and
b) operators and owners for ensuring that changes made through the life of a ship still conform to its
requirements.
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.
ISO 3745, Acoustics — Determination of sound power levels and sound energy levels of noise sources using
sound pressure — Precision methods for anechoic rooms and hemi-anechoic rooms
ISO 9613-1, Acoustics — Attenuation of sound during propagation outdoors — Part 1: Calculation of the
absorption of sound by the atmosphere
lEC 60945:2002, Maritime navigation and radiocommunication equipment and systems — General
requirements — Methods of testing and required test results
IEC 61162-1, Maritime navigation and radiocommunication equipment and systems — Digital interfaces —
Part 1: Single talker and multiple listeners
IEC 61162-450, Maritime navigation and radiocommunication equipment and systems — Digital interfaces —
Part 450: Multiple talkers and multiple listeners — Ethernet interconnection
IEC 62288, Maritime navigation and radiocommunication equipment and systems — Presentation of
navigation-related information on shipborne navigational displays — General requirements, methods of testing
and required test results
IMO, International Regulations for Preventing Collisions at Sea, COLREG 72, Sound Signal Appliances
IMO Resolution A.468(Xll), Code on Noise Levels on Board Ships
IMO Resolution A.694(17), General Requirements for Shipborne Radio Equipment Forming Part of the GMDSS
and for Electronic Navigational Aids
MSC.86(70), Annex 1, Recommendation on performance standards for sound reception systems
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
dB(A)
sound pressure measurement in decibels using A-weighting scale
NOTE The A-weighting scale is used for industrial and environmental applications.
3.2
SPL
Sound Pressure Level
calculation in dB as a ratio of the measured sound pressure to a reference sound pressure, which, for SPL, is 20 uPa
4 Functional requirements
4.1 General
Users of this International Standard shall note that while attempting to implement its requirements, they
shall ensure compliance with such statutory requirements, rules and regulations as may be applicable to the
individual ship concerned.
NOTE All requirements that are extracted from the recommendations of IMO Resolution MSC.86(70), annex 1,
Performance standards for sound reception systems, are printed in italics and the resolution and paragraph numbers are
indicated in brackets.
Sound reception systems shall comply with the following minimum requirements in addition to the general
requirements contained in resolution MSC.86(70), Annex 1, and A.694(17).
4.1.1 Environmental
The sound reception system shall conform to the environmental requirements of IEC 60945. Those elements
of the system exposed to the weather shall use the exposed category and those inside the bridge shall use the
protected category.
The sound reception system shall be resistant to icing and frost conditions.
4.1.2 Audio functions
[IMO MSC.86(70) Annex 1, 2.1.2, 2.1.4 and 3.1] The system shall reproduce incoming sound signals acoustically
inside the bridge. Incoming sound signals shall be reproduced inside the bridge by means of at least one
loudspeaker. The system shall suppress unwanted background noise while allowing reception of meaningful
sounds. The operator must set an appropriate output level to ensure the signal is heard on the bridge.
[IMO MSC.86(70) Annex 1, 3.2] The volume at the speaker(s) shall be adjustable by means of one volume
control only. The volume control shall be capable of being set so that the sound pressure level reproduced
on the bridge for an incoming signal is at least 10 dB(A) above the maximum ambient bridge noise level of
65 dB(A) measured at a distance of 1 m.
4.1.3 Frequency range
[IMO MSC.86(70) Annex 1, 2.1.1] The system shall receive sound signals from all directions in the audio band
70 Hz-2 100 Hz. This frequency range exceeds the limits stated in IMO Resolution MSC.86 (70), Annex 1. The
audibility of a signal of the sound signal appliance is influenced by its fundamental frequency and may include
higher frequency content on smaller vessels.
4.1.4 Visual indicator
[IMO MSC.86(70) Annex 1, 2.1.3] There shall be a display which gives a visual indication of the incoming
signals and their approximate direction. The system shall indicate the approximate direction of incoming sound
signals to determine at least whether the sound signal being detected is forward of or abaft the beam and
from which side of the ship it is being detected. The visual indication shall persist for a minimum of 3 s. The
2 © ISO 2012 – All rights reserved
visual indication can be a dedicated display unit or part of a combined, multifunction display as long as the
performance criteria in this specification are met.
The visual display must indicate the sound being reproduced on the speaker.
4.1.5 Disable function
The system shall provide an input that disables its amplifier when the ship’s horn or whistle is sounded.
4.1.6 Self-test
The system shall provide either a built-in self-test function or an alternate test process to verify the operational
status of the microphones and system on a periodic basis. The alternate test process shall be described in the
user documentation along with a suggested schedule of testing.
4.1.7 Marking and identification
The sound reception systems shall conform to the marking requirements of IEC 60945.
4.1.8 In
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