Section 7 True and False Echoes on Display 7-8
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.
7.4.4 False echo by multiple reflection
When there is a large structure or ship with a high vertical surface near own ship as shown in the
following Figure, multiple refection may appear on the radar display. These echoes appear in the same
intervals, of which the nearest echo is the true echo of the target.
False Eco by Multiple Reflection
Example of false echo by secondary reflection
Secondary reflection of
microwave
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