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Separation in bearing
If there are two echoes next to each other, the radar «beam» must leave the first echo before it hits target no. 2 to be able to
separate the echoes from each other.
Minimum detection distance
If the antenna is placed high, the echo approaching the boat will come under
the radar beam and thus not appear in the radar image. Here comes and goes
the problem of shadow from the hull. IMO is ready in requirements for radar
installation
The antenna must not be mounted so that there is something that shades it at a
longer distance from the boat than:
For boats under 250 m, two boat lengths
For boats over 250m, maximum shade is 500m
JMR-5400 User Manual 20201214 temp
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