3.2 Observe and Adjust Video
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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.
3
Using the manual sea clutter suppression mode
Procedures 1 Adjust the sea clutter returns of the display by turning the
[AUTO-SEA] dial until targets can be easily observed.
Turning [AUTO-SEA] dial clockwise suppresses sea clutter returns.
Turning [AUTO-SEA] dial counterclockwise intensifies sea clutter returns.
The sea clutter suppression function suppresses sea clutter returns by decreasing the
receiving gain on a short range.
Turning the [AUTO-SEA] dial 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.
It is recommended to restore the setting to the factory default,
if you lost the appropriate settings. The factory default level
is shown on the bar chart as a green line
Current Position
Default Position
.
The factory default level is assigned by every function mode.
See the Section 3.9 “USE FUNCTION KEY [FUNC]”.
3-8
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