How To Reduce The Sea Clutter - Furuno 1815 Operator's Manual

2.11

How to Reduce the Sea Clutter

The reflected echoes from the waves appear around your ship and have the name
"sea clutter". The sea clutter extends according to the height of waves and antenna
above the water. When the sea clutter hides the targets, use the sea clutter function
to reduce the clutter, either manually or automatically.
How to select the sea clutter adjustment method
1. Press the RANGE knob to show the [GAIN/SEA/RAIN] window. (This window
closes if there is no operation within 10 seconds.)
2. Select [SEA]. Press the ENTER key to show [SEA AUTO] or [SEA MAN] as re-
quired. For manual adjustment, see the section below.
3. Press the MENU/ESC key to close the window.
Manual adjustment of sea clutter
1. Rotate the RANGE knob (or use  or  on the Cursorpad) to adjust the sea clut-
ter.
Note: When the sea clutter is properly adjusted, the clutter is broken into small
dots, and small targets become identified. If the setting is not enough, targets are
hidden in the clutter. If the setting is higher than necessary, both sea clutter and
targets disappear from the display. Normally adjust the knob until the clutter has
disappeared to leeward, but a small amount of the clutter is visible windward.
2. Press the MENU/ESC key to close the window.
How to select the automatic sea clutter adjustment method
The automatic sea clutter adjustment is available in two types for optimal automatic
adjustment according to the situation. Select the required method as shown below.
1. Press the MENU/ESC key to open the menu.
2. Select [Echo], then press the ENTER key.
AUTO: Automatic, MAN: Manual
Sea clutter at
screen center
SEA setting bar
SEA control adjusted;
sea clutter reduced
2. OPERATION
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