Suppressing Sea Clutter - Furuno FR-8062 Operator's Manual

1. OPERATIONAL OVERVIEW
1.10.3 Manual gain adjustment
1. Push the GAIN control to show "GAIN MANL" as the gain adjustment method.
2. Rotate the GAIN control to adjust the gain. Adjust the control so background noise is just visible
on the screen.
1.11

Suppressing Sea Clutter

Echoes from waves cover the central part of the display with random signals known as sea clutter.
The higher the waves, and the higher the antenna above the water, the further the clutter will
extend. When sea clutter masks the picture, use the SEA control to suppress the clutter, either
manually or automatically.
1.11.1 Choosing sea clutter adjustment method
Sea clutter may be adjusted automatically or manually. Push the SEA control to choose automatic
or manual adjustment alternately. The adjustment method currently chosen is show at the top right
corner of the screen. In the example below the sea clutter adjustment method is "MANL"
(manual)."
SEA adjustment method (MANUAL)
1.11.2 Automatic sea clutter adjustment
1. Press the MENU key to open the menu.
2. Choose the Echo menu and then press the ENTER key.
3. Choose Auto Sea and then press the ENTER key.
Rough
Moderate
Calm
4. Choose the sea condition which best matches the Auto Sea options.
5. Press the ENTER key followed by the MENU key to close the menu.
1-12
TUNE MANL
GAIN AUTO
SEA MANL
RAIN AUTO
SEA indicator