ISO 25861:2007

Ships and marine technology — Navigation — Daylight signalling lamps

ISO 25861:2007 applies to daylight signalling lamps, which are required for certain ships pursuant to Chapter V of the International Convention for the Safety of Life at Sea (SOLAS), 1974, as amended, and Chapter 8 of the International Code of Safety for High-Speed Craft, in force, in accordance with the Performance Standards for Daylight Signalling Lamps [IMO-Resolution MSC.95(72)].

Navires et technologie maritime — Navigation — Lampes de signalisation diurne

General Information

• Status: Published
• Publication Date: 19-Nov-2007
• ICS: 47.020.70 - Navigation and control equipment
• Technical Committee: ISO/TC 8/SC 6 - Navigation and ship operations
• Drafting Committee: ISO/TC 8/SC 6 - Navigation and ship operations
• Current Stage: 9093 - International Standard confirmed
• Start Date: 29-Sep-2023
• Completion Date: 19-Apr-2025

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 25861
First edition
2007-12-01
Ships and marine technology —
Navigation — Daylight signalling lamps
Navires et technologie maritime — Navigation — Lampes de
signalisation diurne
Reference number
©
ISO 2007
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©  ISO 2007
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ii © ISO 2007 – All rights reserved

Contents Page
Foreword. iv
Introduction . v
1 Scope. 1
2 Normative references. 1
3 Terms and definitions. 1
4 Requirements. 2
4.1 Required functions and their availability [MSC.95(72), 1.2, 5.1]. 2
4.2 Switch-on and switch-off time [MSC.95(72), 5.2.6] . 2
4.3 Luminous intensity [MSC.95(72), 5.2] . 2
4.4 Chromaticity of the emitted light [MSC.95(72), 5.2.5]. 2
4.5 Malfunctions, warnings, alarms and indications [MSC.95(72), 5.3] . 2
4.6 Ergonomic and operational controls [MSC.95(72), 6] . 3
4.7 Durability and resistance to environmental conditions [MSC.95(72), 7.1]. 3
4.8 Electromagnetic compatibility (EMC)/interference [MSC.95(72), 7.2]. 3
4.9 Power supply [MSC.95(72), 7.3] . 3
4.10 Maintenance [MSC.95(72), 7.4]. 3
4.11 Back-up and fall-back arrangements [MSC.95(72), 8] . 4
4.12 Safety precautions [MSC.95(72), 9] . 4
4.13 Permanent operation and life duration. 4
4.14 Shock. 4
4.15 Pan and tilt ranges for fixed daylight signalling lamps .4
4.16 Mounting. 4
5 Type approval tests . 4
5.1 Testing of the luminous intensity . 4
5.2 Testing of the chromaticity. 5
5.3 Measurement of the switch-on and the switch-off time. 5
5.4 Test of durability and resistance to environmental conditions . 5
5.5 Test of the capacity of the battery . 5
5.6 Maximum surface temperatures. 6
5.7 Pan and tilt ranges for fixed daylight signalling lamps . 6
5.8 Test of the lamp life duration. 6
5.9 Shock test. 6
6 Test report. 6
7 Documentation [MSC.95(72), 11] . 6
8 Marking and identification [MSC.95(72), 10]. 7
Bibliography . 8

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 25861 was prepared by Technical Committee ISO/TC 8, Ships and marine technology, Subcommittee
SC 6, Navigation.
iv © ISO 2007 – All rights reserved

Introduction
ISO 17884 “Ships and marine technology — Searchlights for high-speed craft” specifies many requirements
that are also applicable for this International Standard, ISO 25861 “Ships and marine technology —
Navigation — Daylight signalling lamps”. For a clearer structure, it is proposed for the future to merge these
International Standards into one International Standard with a general part and an Annex A for searchlights
and an Annex B for daylight signalling lamps.

INTERNATIONAL STANDARD ISO 25861:2007(E)

Ships and marine technology — Navigation — Daylight
signalling lamps
1 Scope
This International Standard applies to daylight signalling lamps, which are required for certain ships pursuant
to Chapter V of the International Convention for the Safety of Life at Sea (SOLAS), 1974, as amended, and
Chapter 8 of the International Code of Safety for High-Speed Craft, in force, in accordance with the
Performance Standards for Daylight Signalling Lamps [IMO Resolution MSC.95(72)].
Where the wording of this International Standard is identical to that in MSC.95(72), all such text is printed in
italics and the resolution and paragraph numbers are indicated in brackets.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
ISO 17884, Ships and marine technology — Searchlights for high-speed craft
IEC 60529, Degrees of protection provided by enclosures (IP Code)
IEC 60598-1, Luminaires — Part 1: General requirements and tests
IEC 60945, Maritime navigation and radiocommunication equipment and systems — General requirements —
Methods of testing and required test results
IMO Resolution A.694(17), General requirements for shipborne radio equipment forming part of the Global
maritime distress and information system (GMDSS) and for electronic navigational aids
IMO Resolution A.813(19), General requirements for electromagnetic compatibility (EMC) for all electrical and
electronic ship's equipment
IMO Resolution MSC.95(72), Performance standards for daylight signalling lamps
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 17884 and the following apply.
NOTE The IMO-used expressions “half angle of divergence” and “tenth angle of divergence” are synonymous to “half
peak divergence” and “tenth peak divergence”.
3.1
daylight signalling lamps
lamps suitable for transmitting white light signals to an observer by focused light beams which may be fixed or
portable
[MSC.95(72), 4]
3.2
switch-off time
the period of time required for luminous intensity to decrease to 5 % of the required luminous intensity after
the daylight signalling lamp has been switched off
[MSC.95(72), 4]
4 Requirements
4.1 Required functions and their availability [MSC.95(72), 1.2, 5.1]
Daylight signalling lamps shall be suitable for conveying information between ships, or between ship and
shore, by means of light signals, both by day and by night.
Daylight signalling lamps shall be suitable for giving light signals, which can be clearly distinguished visually
as separate signals by an observer.
4.2 Switch-on and switch-off time [MSC.95(72), 5.2.6]
The sum of switch-on and switch-off times shall not exceed 500 ms.
4.3 Luminous intensity [MSC.95(72), 5.2]
By day and with an atmospheric transmission of 0,8, the visibility of light signals emitted by daylight signalling
lamps shall be at least 2 nautical miles, equalling a required luminous intensity of 60 000 cd.
The axial luminous intensity of daylight signalling lamps shall reach at least 90 % of the maximum luminous
intensity.
The luminous intensity of daylight signalling lamps shall have its maximum in the centre of the luminous
intensity distribution. It shall decrease evenly from the centre of luminous intensity distribution.
The half peak divergence α shall not exceed 9°, the tenth peak divergence α shall not exceed 14°.
h t
The effective light emission sectors of daylight signalling lamps shall be circular.
4.4 Chromaticity of the emitted light [MSC.95(72), 5.2.5]
The chromaticity of the white signal light shall lie within the following corner coordinates of the chromaticity
diagram specified by the International Commission on Illumination (CIE), see Table 1.
Table 1 — Chromaticity coordinates
x 0,525 0,525 0,452 0,310 0,310 0,443
Chromaticity coordinates
y 0,382 0,440 0,440 0,348 0,283 0,382

4.5 Malfunctions, warnings, alarms and indications [MSC.95(72), 5.3]
Daylight signalling lamps shall be provided with an indication of their operational status.
If a separate power supply is used, instead of using shipborne power supply, daylight signalling lamps shall be
provided with a battery charge level indicator, fixed to the daylight signalling lamp or the battery housing.
2 © ISO 2007 – All rights reserved

4.6 Ergonomic and operational controls [MSC.95(72), 6]
Daylight signalling lamps and any battery required for operation shall be designed in such a way that safe
handling in the intended application is ensured. The daylight signalling lamp shall be capable of being
operated by personnel wearing heavy working gloves.
The operational controls of daylight signalling lamps shall meet the requirements of IMO Resolution A.694(17)
and the applicable requirements of IEC 60945.
4.7 Durability and resistance to environmental conditions [MSC.95(72), 7.1]
Daylight signalling lamps shall be constructed in accordance with IEC 60598-1.
The illuminant shall be safely fitted in the daylight signalling lamp; use of screwed sockets shall be avoided.
Daylight signalling lamps shall be designed in such a way that the illuminant can be easily replaced also in the
dark.
The sighting mechanism shall be mounted in a fixed attitude, parallel to the opt
...