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* If there is a concern that structural objects existing within the vertical beam width
may generate false images, equip the structural objects with a radio wave
absorber. (There are two types of absorbers: broadband type having no
specific resonant frequency and narrowband type which can absorb a band with
a specific frequency. Use those where applicable.) Furthermore, it is effective
to install a metal reflector, which reflects radio waves upwardly, between the
scanner and a structural object so that the radar's radio wave will not directly
come in contact with the structural object.
Note:
Because most radio wave absorbers have poor durability, some must be
replaced every year. When installing a reflector, the area to the rear of the
reflector becomes a blind sector. Therefore, minimize the size of the
reflector.
* The above procedures for selecting the scanner installation position are described based
on the radar's scanner. Comprehensively select the scanner position by considering
other scanners' installation procedure manual, hull's structure, strength of the selected
position, and vibration.
2.4.4 Confirmation during Test Run
If the scanner vibrates a lot during test run, try to reduce or prevent vibration by
reinforcing the scanner mount base or using wire stays attached to the radar mast.
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