- in a sector from 112.5°to minimally 175°, and from minimally 185°to 247.5°, deepest shadows are kept to a minimum;
- in the required field of view, in the direction ahead, visibility of the water surface for the vertically tilted sensor is not reduced by more than one ship's length by the blind angle of one's own craft.
Night vision equipment should be designed and mounted 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°.
Its performance data should not be impaired by vibration occurring during normal ship's operation.
7.5 MAINTENANCE
With respect to maintenance, night vision equipment should meet the requirements of resolution A.694(17) and the applicable IEC requirements *1).
8 INTERFACING
Interfaces should meet applicable international standards *2). A video output for image recording should be provided of 1 Volt pk-pk into 75 Ohms composite video.
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.
10 SAFETY PRECAUTIONS
The safety features of night vision equipment shall meet the requirements of resolution A.694(17) and the applicable IEC requirements *1).
*1) IEC 60945
*2) IEC 61162-l
