Chapter 2  OPERATIONS 
2.5  SEA CLUTTER SUPPRESSION 
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INSTRUCTION MANUAL 
 [SEA] Control 
The sea clutter suppression function suppresses sea clutter returns by decreasing the 
receiving sensitivity on a short range. Turn the [SEA] control clockwise to heighten the 
effect of sea clutter suppression. However, be careful that excessive suppression causes 
low signal-strength targets such as buoys and boats to disappear from the radar display. 
 Automatic Sea Clutter Suppression Function 
Sea clutter suppression can be performed in accordance with the level of sea clutter. Use 
this automatic mode when sea clutter returns vary in direction. 
1  Hold down the [SEA] control. 
 
Automatic function is selected. 
Even when the automatic function is selected, you can manually perform fine 
adjustments by turning the [SEA] control. 
 
 
The sea clutter suppression adjustment screen appears when turning the [SEA] 
control. Sea clutter suppression can be adjusted between 0 and 100. 
 
 
When the sea clutter suppression (Auto) is set to "0" 
 
When the sea clutter suppression (Auto) is set to "10"