Furuno WV-100, Руководство оператора, Страница: 17 / 56

2. PRINCIPLE OF OPERATION, HOW TO INTERPRET THE DISPLAY
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The figure below is an example of echo during rainfall. This image is less reliable because no
stripes are visible, that is, the spectrum is broadened and there are no outstanding waves.
Example image for low reliability
Difference for the wave result between this software and visual observation
The waves that can be detected by this software are gravity waves with a wave period of 4 sec-
onds or more. The waves with a short period, that is, the waves blown by the wind may not be
observed. Therefore, the visual wave direction and the analysis result may be different (see the
figure below).
Wave spectrum Radar echo
Detection
sensitivity
4 sec. 15 sec.
Wave period
: Wave radar (Detection sensitivity
for long period is high.)
: Visual observation (Detection
sensitivity for short period is high.)