2 NAVIGATIONAL AIDS AND RELATED MATTERS
Night Vision Equipment
2.1 The Group considered NAV 44/7/1 (Germany), NAV 44/7/7 (UK) and NAV 41/6/3 (Hong Kong China) concerning performance standards for Night Vision Equipment for High Speed Craft (HSC) and developed a draft performance standard given in Annex 1.
2.2 This, in particular, had addressed the requirements for range and field of view, and was drafted in a way that was independent of the technology employed such as infra-red or image intensification. It was assumed that the ISO would provide the detailed technical aspects.
2.3 Members were invited to provide their comments and proposals thereon for NAV45.
Daylight Signaling Lamps
2.4 The group considered NAV 44/7/2 (Germany) concerning performance standards for Daylight Signaling Lamps and developed a draft performance standard given in Annex 2.
2.5 In para 5.2 chromaticity coordinates are provided from the International Commission on Illumination (CEI) Publication NO.2.2 1975. Members should note that this publication is currently under review in CEI and should stress to CEI that any changes in the coordinates will have a considerable effect on the Performance Standards and Conventions of the Organization.
2.6 Members were invited to provide their comments and proposals thereon for NAV45.
User Requirements for Heading Systems
2.7 The group noted that there are certain equipment within SOLAS Chapter V and SOLAS Chapter X that may require a true heading input such as Radar, AIS etc Heading information may be obtained from a Transmitting Magnetic Heading Device or a Gyrocompass.
2.8 The existing Performance Standards of the Organization give the accuracy required of the Transmitting Magnetic Heading Device and the Gyrocompass. Some of the Performance Standards state the accuracy required by the instruments that use the heading information but some do not. In general there is a need to match the requirements of the "user" instruments with the obtainable accuracies of the devices that supply the heading information.
2.9 The group prepared the Tables given in Annex 3 as the first analysis of the requirements.
