Paragraph 1

The complete light unit shall be constructed with proper workmanship and materials. The materials shall be compatible with materials used in the construction of a lifejacket.

The unit shall be provided with a fixed or flashing light.

The unit shall be rot-proof, corrosion resistant and not be unduly affected by sea-water, oil or fungal attack.

The unit shall not have any adverse effect on the performance of the lifejacket to which it is attached.

Each component of the unit shall be designed to remain serviceable for at least as long as the storage life of the power source.

The unit shall be so designed that it will not leak any substance which would be harmful to the lifejacket, immersion suit or wearer.

A flashing light shall be provided with a manually operated switch.

A flashing light shall not be fitted with a lens or curved reflector to concentrate the beam.

Components of electronic circuits of the unit shall comply with the quality control requirements of BS 9000 or the Ministry of Defence Standard 05-21. Where components cannot be obtained under one of the above standards these components shall be covered by a Certificate of Conformance from the manufacturer of the components.