1 Scope
This document specifies the performance requirements, test methods and marking of light emitting diode (LED) navigation lights for permanent fixed use. This document applies to small boats up to 24 m.
2 Normative references
The contents of the following documents constitute essential provisions of this document through the normative references in the text. Among them, note the date of the reference documents, only the date of the corresponding version applicable to this document; do not note the date of the reference documents, the latest version (including all the revision of the list) applicable to this document.
GB/T 26184-2010 Method for the measurement of absolute luminous intensity distribution (CIE 70:1987, IDT)
ISO 11664-1 Colourimetric method part 1:CIE standard colourimetric observations
IEC 60068-2-27:2008 Environmental tests Part 2-27: Test method, test Ea and guidelines: Shock
Note:GB/T 2423.5-2019 Environmental tests Part 2: Test force method test Ea and guidelines: Impact (IEC 60068-2-2712008.IDT)
IEC 60529,1989 Enclosure protection class
Note:GB/T 4208-2017 Enclosure protection class (positive code)(IEC 60529:2013,IDT)
IEC 60945:2002 General requirements for maritime navigation and radiocommunication equipment and systems, test methods and test results
CIE 15 Colourimetry
CIE 69 Performance, characteristics and specifications of methods for characterising illuminance meters and luminometers
COLREGs International Regulations for Preventing Collisions at Sea (19723 Terms and Definitions)
3 Terminology and definitions
The following terms and definitions are applicable to this document.
3.1
Flashing light
A regular flash of light at intervals of 120 or more times per minute.
3.2
Navigation light
A coloured light source used to indicate the position, course and status of a ship.
3.3
Signal light The light emitted by a navigation light.
3.4
Range of visibility the distance at which the light from a navigation light can be seen.
3.5
rated voltage
The operating voltage or range of voltage at which a navigation light is designed and determined by the manufacturer.
3.6
zero signal direction
The light emitted by a navigation light in the plane of the centreline or in a horizontal plane parallel to it.
Note: The input zero signal direction is specified in this document as 0° or "fully forward".
4 Abbreviations
The following abbreviations apply to this document.
International Commission on tikumination (CIE)
COLREGs Internotiotnal Regulations for Preventing Collisions atSea (1972)
LED Light Emitting Diode (Light Emitting Diode)
5 Minimum requirements
5.1 Luminous intensity and visibility range
In the laboratory, the luminous intensity measured with the rated voltage is I. The luminous intensity is measured in kan (cd).
Consider the aging of the light source, optical system contamination and the pressure drop of the dinghy power system and other actual working conditions under the influence of luminous intensity of In, its unit is Kan (cd).
Luminous intensity Ⅰn than luminous intensity Ⅰ. 20% smaller, see the values listed in Table 1.
The visibility range of the navigation light depends on the actual measured luminous intensity I. The range given in table 1. The navigational light visibility values should not be too high or too low.
5.2: Light distribution
5.2.1 Light distribution in the horizontal plane
The requirements of the COLREGs apply to this document.
COLREGs are expressed as "almost zero" or "achievable reduction" if they are not greater than 12.5% of the mean luminous intensity value. The angle between measurements should not exceed 0.2°.
The luminous intensity on the port and starboard sides shall not exceed the maximum permissible luminous intensity in an arc of 3° visibility on each side in the direction of the zero signal, and the minimum luminous intensity shall not be less than the required value.
The horizontal luminous intensity of the navigation lights shall be uniformly distributed in the angle of illumination so that the ratio between the maximum and minimum values of the light intensity does not exceed 1.5 times.
5.2.2 Vertical light distribution
The requirements of the COLREGs apply to this document.
The maximum vertical luminous intensity is not to exceed 1.5 times more than the horizontal luminous intensity at 0°. Navigation lights with a vertical luminous intensity distribution shall be marked accordingly in accordance with the provisions of 10(a) in Annex I of the COLREGs (for motorised vessels only).
5.3 Colourimetric requirements
The chromaticity range is shown in Table 2.
5.4 Flash
The relevant indicator for the visibility range is the effective visual luminous intensity (Igw).
The ltwr should be at least the minimum luminous intensity (I) in Table 1 for the horizontal plane.
Light is considered stable if its duration is less than the rise time and decay time and the instantaneous luminous intensity reaches or exceeds the required minimum luminous intensity for a period greater than o.3 s. It shall not be determined as an effective luminous intensity.
The range of luminous intensities for visibility and chromaticity specified in 5.1 and 5.3 applies, but there is no upper limit. Vertical surface exposure shall be at least 4.
The luminous intensity shall be 80% of the luminous intensity at o° when the flash is inclined at an angle of 2° relative to the horizontal.5.5 Electrical safety
Electrical safety shall be ensured in accordance with IEC 60945;2002.
5.6 Reflectors
Reflectors are only permitted to be used in sealed systems.
5.7 Power supply
The requirements of IEC 60945:2002 apply to this document except in the following cases:
a) power supply overruns
b) Extreme conditions;
c) power supply failure.
5.8 General requirements
5.8.1 General rules
Unless otherwise specified in this document, the requirements of IEC 60945;2002 shall be complied with.
5.8.2 Equipment categories
The equipment category of the navigation lights belongs to the "Exposed to atmosphere" category according to IEC 60945;2002.
5.8.3 Vibration
5.8.4 Rain and fog
Continuously operating navigation lights shall comply with the requirements of IEC 60945;2002, IP66, without any permitted changes.
The test shall be performed as described in 6.3.6.
5.8.5 Sunlight radiation
The test shall be carried out as described in 6.3.7.
5.8.6 Corrosion (salt spray)
The test shall be carried out as described in 6.3.1.
5.8.7 Electromagnetic compatibility
Shall be tested in accordance with IEC 60945:2002.
5.8.8 Compass safety distance
The requirements of IEC 60945:2002 do not apply to navigation lights consisting of non-magnetic materials.
5.8.9 Housing temperature
The parts of the electrical navigation light housing that may be accessible by hand during normal operation shall meet the requirements of the test described in 6.4.2.
5.8.10 Mechanical shock
The test shall be performed as described in 6.4.1.
5.9 Deviations due to operating conditions
The manufacturer shall indicate when the required range of visibility can no longer be achieved due to deterioration, ageing or failure of the light source components.
5.10 Temperature effects
5.10.1 Effect of temperature on chromaticity coordinates and luminous intensity
6 Tests
6.1 General requirements
6.1.1 Validity of IEC 60945;2002
Unless otherwise specified in this document, the test conditions in IEC 60945;2002 apply to this document.
6.1.2 Performance tests and checks
The light levels and colour levels described in this document are tested in accordance with the performance test (PT) requirements of IEC 60945;2002. The Performance Check (PC) according to IEC 60945;2002 requires an inspection only after the navigation light has been switched on.
The Performance Check (PC) shall be carried out after or during the completion of all tests according to IEC 60945;2002. The performance test (PT) shall be carried out after the sequence described in the "Test sequence" and after the corrosion test.
6.1.3 Test sequence
Tests shall be carried out on the same navigation light in the order of vibration, shock, dry heat, low temperature, solar exposure, rain and salt spray tests. At the end of these tests, the performance test (PT) shall be carried out directly on the navigational light.
The tests for the remaining items may be carried out in any order.
6.1.4 Documentation
All tests shall be documented.
6.1.5 Light source
The manufacturer of the navigational light shall specify the light source to be used for the navigational light. If the manufacturer agrees to change the light source for the navigation light, the light level and colourimetric tests shall be repeated.
6.2 Illuminance and colourimetric tests
6.2.1 Test voltage
7 Marking
In addition to the marking requirements specified in IEC 60945;2002, each navigation light shall, after installation on board, be clearly and permanently marked in a conspicuous position with the following information:
--the direction of the zero signal marked with the light sector
--the range of illumination in nautical miles (nm)
--the mark of origin (manufacturer's identification):
--Approval mark;
--Model name
--Symbol or identification mark for navigational lights with vertical light distribution, for powered dinghies only. As a difference to IEC 60945:2002, the serial number marking is not required.
Bibliographic
