7.4.2 The controls of night vision equipment should be installed in the workstation for navigating and manoeuvring, within easy reach of the navigator.
7.4.3 The observation distance from a dedicated display should not exceed 2.3 times the image diagonal.
7.4.4 The sensor of the night vision equipment should be installed in such a way that:
.1 the horizontal panning area required in paragraph 5.2.5 is free of blind sectors up to 30° on either side; and
.2 in the required field of view, in the direction right ahead, visibility of the water surface for the vertically tilted sensor is not reduced by more than two craft's lengths by the blind angle of own craft.
7.4.5 Night vision equipment should be installed in such a way that its operation and detection functions are not impaired by head wind and/or true wind up to 100 knots and roll and/or pitch angles up to ±10°.
7.4.6 Its performance should not be impaired by vibration occurring during normal craft's operation.
7.5 MAINTENANCE
With respect to maintenance, night vision equipment should meet the requirements of resolution A.694(17) and the applicable international standards*. Where the manufacturer requires maintenance at specific periods, an operating hours meter should be provided.
8 INTERFACING
Interfaces with other radio and navigation equipment should meet applicable international marine interface standards**. A recognized international video output standard for image recording should be provided.
9 BACK-UP AND FALL-BACK ARRANGEMENTS
In the event of failure of the pan-tilt device, the sensor should be capable of being fixed in the ahead position while underway.
10 SAFETY PRECAUTIONS
The safety features of night vision equipment should meet the requirements of resolution A.694(17) and the applicable international standards.*
*Refer to IEC Publication 60945
**Refer to IEC Publication 61162
