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Sea clutter
Rain clutter
Interference
Radar returns from waves around the boat can clutter the
center of the radar picture, making it difficult to detect real
targets. Such 'sea clutter' usually appears as multiple echoes
on the display at short range scales., and the echoes are not
repetitive or consistent in position. With high winds and
extreme conditions, echoes from sea clutter may cause dense
background clutter in the shape of an almost solid disc.
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The radar can see echoes from rain or snow. Returns from
storm areas and rain squalls consist of countless small echoes
that continuously change size, intensity and position. These
returns sometimes appear as large hazy areas, depending on
the intensity of the rainfall or snow in the storm area.
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When two or more radar-equipped boats are operating
within range of each other, mutual radar interference can
occur. This usually appears as a spiral of small dots from the
display center. This type of interference is most noticeable at
long ranges.
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RayTech RNS V5.0 - User's Manual
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