Suppress Sea Clutter [Auto-Sea] - JRC JMA-5206 Instruction Manual

3.4.6 Suppress Sea Clutter [AUTO-SEA]

Procedures 1 Control the sea clutter returns on the radar display by turning the
[AUTO-SEA] control until targets can be easily observed.
Turning [AUTO-SEA] control clockwise suppresses sea clutter returns.
Turning [AUTO-SEA] control counterclockwise intensifies sea clutter returns.
The sea clutter suppression function suppresses sea clutter returns by decreasing the receiving
sensitivity on a short range.
Turning the [AUTO-SEA] control clockwise heightens 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.
Before sea clutter returns can be suppressed in accordance with their intensity, the automatic
sea clutter suppression mode must be selected by pressing the [AUTO-SEA] control. Use
this automatic mode when sea clutter returns vary in direction.
To change back to the manual mode, press the [AUTO-SEA] control again.
Note: The AUTO SEA (automatic sea clutter suppression) mode and the AUTO RAIN (automatic
rain/snow clutter suppression) mode cannot be used at the same time.
Using AUTO SEA (automatic sea clutter suppression function)
Procedures 1 Press the [AUTO-SEA] control.
AUTO SEA is selected, and SEA AUTO is indicated at the lower left of the radar
display. If AUTO SEA is selected, rotating the AUTO RAIN control and AUTO SEA
control can make fine adjustments manually.
Caution
When using the [AUTO SEA] 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 [AUTO SEA] function, make sure to
choose the most appropriate image noise suppression
level.
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3.4 BASIC OPERATIONS
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