Section 7 True and False Echoes on Display 7-10
When a radar antenna for the solid-state radar is connected, a false echo may occur in the range
direction of the target image. This false echo normally means a range side lobe, which is generated as
a result of pulse compression processing when a large target such as a vessel is at a short distance.
7.4.3 False echo by secondary reflection
When a target exists near own ship, two echoes from the single target may appear on the radar
display.
One of those echoes is the direct echo from the target and the other is the secondary reflection from a
mast or funnel that stands in the same direction as shown in the following Figure.
False
echo
Example of false echo by secondary reflection
Secondary reflection of
microwave
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