JRC JMA-2343, Instruction Manual

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3.3.10 In case of high waves
CAUTION
On short range scales, the setting of the sea surface clutter suppression should
not be advanced to an extent that results in complete suppression of all clutter.
Such a setting may suppress echoes from targets such as vessels or hazardous
objects in addition to echoes from the waves and thus impair detection.
When using the sea surface clutter suppression function, be sure that the sup-
pression level is set at the optimum.
When sea waves become high, echoes from the high waves (sea clutter) appear on the
PPI screen making it difficult to see image of echoes from vessels or other objects. Sea
clutter is increasingly prominent to the extent that its source is close to the ship.
By using the [SEA] control function or the "automatic sea surface" function, sea surface
clutter may be suppressed facilitating monitoring of the targets.
Manual sea surface clutter suppression Manual sea surface clutter suppression Manual sea surface clutter suppression Manual sea surface clutter suppression
(a) Turn the [SEA] control in the clockwise direction.
As the control is turned in the clockwise direction, suppression of sea surface
clutter increases.
Automatic sea surface clutter suppression
Automatic sea surface clutter suppression Automatic sea surface clutter suppression
Automatic sea surface clutter suppression
(a) Push the soft key
ＰＲＯＣＥＳＳ ＰＲＯＣＥＳＳ ＰＲＯＣＥＳＳ ＰＲＯＣＥＳＳ
.
(b) Push the soft key 1 to select
Ａ－ＳＥＡ Ａ－ＳＥＡ Ａ－ＳＥＡ Ａ－ＳＥＡ
.
Sea surface clutter suppression is enabled depend on the condition of the image.
(c) Push the
ＭＥＮＵ ＭＥＮＵ ＭＥＮＵ ＭＥＮＵ
key.
The soft key will return to the initial function display.
Sea clutter being displayed as
image due to high waves. Sea clutter has been suppressed (the
image of the echo from the target has
also been suppressed).