JRC JMA-2343, Instruction Manual

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9.2 Installing the Scanner Unit
9.2.1 Selecting the installation location
CAUTION
The scanner unit shall be installed where there are not large obstacles in the
direction of the ship's heading line in the same plane.
If there is a large impediment in the same plane as the scanner unit, this may
cause the generation of folse echoes. In particular, if such folse echoes
appear at the ship's heading line, monitoring will be difficult and this may
cause inadequate forecasting of danger.
Do not install the scanner unit near chimney's or the exhaust of chimneys.
Soot will cause the performance of the radar to decrease and heat may cause
breakdown.
Do not install direction antenna or VHF antenna in the vicinity of the scanner
unit. Doing so may cause noise in the antenna reception.
Consideration should be given to separating the radar cable from the cables
for the direction antenna and VHF antenna.
These cables should never be bundled into one. Doing so may cause noise
in the antenna reception.
9.2.2 Installation procedure
(a) If it is found that there is no height above the roof of the wheel house enough to directly
accommodate a scanner unit, install a pedestal or radar mast.
(b) In addition to a pedestal or radar mast, it is necessary to provide an appropriate staging
for convenience in installation, maintenance, adjustment, and repair of the scanner
unit.