Standard Horizon CPV550, CP500, CP180I, CP300 operation manual Radar sensitivity appears to be low

5.6The Radar sensitivity appears to be low

Radar sensitivity depends on several factors. To increase sensitivity act as follows:

·Execute the Automatic Tuning procedure to ensure that the Radar is perfectly tuned.

·Increase the GAIN.

·Reduce the SEA clutter, since the SEA clutter has the effect to reduce the echo intensity of nearby targets.

·Turn Off the RAIN clutter, since it has the effect to reduce the echoes intensity of big targets.

5.7Radar targets are delayed with respect to the antenna rotation?

The Radar image on the GPS is updated every 2.5 seconds as information is acquired from the antenna. This could cause a mis-match between the actual target position and the targets shown on the screen.

5.8Radar target appear to be pulsing

This is a rather common problem for any Radar. For long distance targets, when the Radar pulse hits a target, the reflection strength which depends on the hit angle. Perpendicular hits give the strongest echo. Hard objects give stronger echo and soft objects give weaker echo. To eliminate the pulsing effect of Radar targets the Trails function may be used.

5.9Stationary target appear to be oscillating around their actual position

Radar targets may appear to be oscillating around their actual position due to the movement of your vessel. In fact even a minimum oscillation of the position where the Radar is located may cause an apparent movement of the targets detected.

For short distance targets, surface waves lower the detectivity. The SEA clutter should be adjusted to properly to maximize the detectivity.

Page 38 Radar Operation Manual