1. OPERATION
1-20
1.14
How to Reduce the Sea Clutter
The reflected echoes from the waves
appear around your ship and are
called “sea clutter”. The sea clutter
extends according to the height of
waves and antenna above the water.
When the sea clutter hides the tar-
gets, reduce the clutter, either manu-
ally or automatically.
1. Click the STC mode icon at the bottom right corner on the screen to show [MAN]
or [AUTO] as appropriate.
2. For manual adjustment, rotate the setting knob to adjust the sea clutter so that the
clutter is broken into small dots, and small targets become identified. If the setting
is too low, targets are hidden in the clutter. If the setting is too high, both sea clutter
and targets disappear from the display. Normally adjust the control until the clutter
has disappeared to leeward, but a small amount of the clutter is visible windward.
For auto mode, the setting range is -50 to 50. For manual mode, 0 to 100.
STC PRESET
You can tune STC properly with the [STC PRESET] function.
1. Click the STC mode icon to set [MAN] (Manual mode).
2. Put the cursor on the STC setting box at the bottom right corner on the screen.
3. Rotate the setting knob to set the level to use as lowest level for STC adjustment.
4. Open [MAIN MENU], click [ECHO].
5. Click [STC PRESET].
6. Click [ON] to activate the
[STC PRESET] function. The STC
bar is re-scaled to set the STC level
to zero.
Sea clutter at screen
center
STC adjusted; sea
clutter suppressed
[AUTO]: Auto
[MAN]: Manual
MAN TUNE
AUTO GAIN
AUTO STC
AUTO RAIN
0
0
0
MAN TUNE
AUTO GAIN
MAN STC
AUTO RAIN
0
100
0
Click
STC mode
icon
MAN TUNE
AUTO GAIN
MAN STC
AUTO RAIN
0
100
0
STC setting box
0
100
Current level
0
100
STC PRESET [ON]
STC PRESET [ON]
Change of the STC scale bar
