Sperry Marine Visionmaster FT ECDIS, User Manual

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ECDIS User Guide Radar
65900012 11-7
Always use the control with great care. Excessive suppression can
cause loss of small targets. It is often advantageous to use this
control to search for targets in the clutter region, returning the
control to zero after the search.
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Anti Clutter (SEA)
Use the Anti-Clutter SEA control to reduce sea clutter to an
operational level where some residual clutter speckle is present.
The setting must permit small targets, often of similar signal
strength to the sea clutter returns to be detected.
Always use the control with great care. Avoid setting the control to
completely remove all sea clutter, as this will reduce the detection
of small targets. The setting should be periodically checked as
prevailing sea conditions change.
Manually Adjusting Video Gain and Anti-Clutter Controls
The video processing controls can be adjusted independently. The
RAIN/SEA anti clutter levels can only be adjusted when the AUTO Anti-
Clutter is switched off.
To manually adjust the Video GAIN, RAIN and SEA settings, do the
following:
1. Tick the AUTO Anti-Clutter check box off.
2. Position the screen cursor over the control you wish to change.
3. Left click to make control bar active. The bar colour will appear
blue.
4. Move the trackball left or right to move
the bar to the gain/suppression level
required, as the bar is adjusted the
current percentage figure appears in
the centre of the field. You can exit
the adjustment and return to the
previous setting by right clicking.
5. Left click to set the level and de-activate the bar adjustment. The
bar will return to its green shaded state and the percentage figure
disappears.
6. When AUTO Anti-Clutter check box is ticked after adjustment the
RAIN and SEA Anti-Clutter settings appear grey.
IMPORTANT NOTE – There are different stored values of Gain
setting for AUTO Anti-Clutter and Manual, you will need different
settings for each mode.