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

5. OPERATION
2. Press the MENU/ESC key to close the window.
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How to Reduce the Rain Clutter

The reflections from the rain or snow appear on the screen. These reflections have the
name "rain clutter". When the rain clutter is strong, targets in the rain clutter are hidden
in the clutter. Reflections from the rain clutter are easily identified from true targets by
their wool-like appearance.
The rain clutter function works like the sea clutter function, adjusting the receiver sen-
sitivity, but in longer range. If the setting is high, the rain clutter is more reduced. The
rain control breaks the continuous display of rain or snow reflections into a random
pattern. When the rain clutter hides the targets, adjust the rain clutter (automatic or
manual) to reduce the clutter.
How to select the rain clutter adjustment method
1. Press the RANGE knob to show the [GAIN/SEA/RAIN] window.
2. Use the Cursorpad to select [RAIN]. Press the ENTER key to show [RAIN AUTO]
or [RAIN MAN] as required. For manual adjustment, see the section below.
3. Press the MENU/ESC key to close the window.
Manual adjustment of rain clutter
1. Rotate the RANGE knob (or use  or  on the Cursorpad) to adjust the rain clut-
ter.
2. Press the MENU/ESC key to close the window.
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Sea clutter at
screen center
Sea clutter
AUTO: Automatic, MAN: Manual
GAIN/RAIN/SEA window
Sea clutter properly adjusted;
sea clutter reduced
RAIN setting bar