3-7 
3.2.4 Adjust Gain [GAIN / PL] 
 
 
CAUTION 
If the gain is too high, unnecessary signals including 
receiver noise and false video increase resulting in 
reduction of visibility of targets. 
On the contrary, if the gain is too low, targets including 
ships and dangerous objects may not be clearly indicated. 
 
 
 Procedures   1  Adjust noise of the display by turning the [GAIN / PL] dial until targets 
can be easily observed. 
 
Turning [GAIN / PL] dial clockwise increases gain. 
Turning [GAIN / PL] dial counterclockwise decreases gain. 
 
By increasing receiving gain, the range to observe radar video is widened. 
To observe densely crowded targets or short-range targets, reducing the receiving gain will 
enable the targets to be easily observed. 
 
 
 
3.2.5  Suppress Sea Clutter [AUTO-SEA] 
 
 
CAUTION 
When using the sea clutter suppression function, never set 
the suppression level too high canceling out all image 
noises from the sea surface at close range. 
Detection of not only echoes from waves but also targets 
such as other ships or dangerous objects will become 
inhibited. 
When using the sea clutter suppression function, make 
sure to choose the most appropriate image noise 
suppression level.