Furuno FR-8252 Suppressing Sea Clutter, Choosing sea clutter adjustment method, SEA indicator

1. OPERATIONAL OVERVIEW

1.11Suppressing 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 A/C SEA control to suppress the clutter, either manually or automatically.

1.11.1Choosing sea clutter adjustment method

Push the A/C 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 “AUTO”.

TUNE AUTO

GAIN AUTO

A/C SEA adjustment method (AUTO) SEA AUTO

RAIN AUTO

A/C SEA indicator

1.11.2Setting automatic sea clutter suppression level

1.Press the MENU key to open the menu.

2.Choose the Echo menu and press the ENTER key.

3.Choose Auto Sea and press the ENTER key.

Rough

Moderate

Calm

4.Choose the option which best matches current sea condition and press the ENTER key.

5.Press the MENU key to close the menu. Sea clutter is automatically adjusted according to the level selected.

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