CR40/42/50 MKII Installation manual
Chapter 9
133
9.9 Installation of scanner unit
A radar’s target detection capacity varies greatly depending on the fitted position
of the scanner. An ideal fitting position is a location high above the ship’s keel
line where there is no obstacle all around the scanner. In an actual ship, such an
ideal location is limited by various factors. Therefore, consider the following
suggestions when you determine the place to install the scanner:
A.
Install scanner at a position as high as possible
The higher the installation position, the longer the radio ranging distance.
Install the scanner at a position as high as possible after considering the
ship’s hull structure and radar maintainability.
B.
Install scanner away from smoke-stack and mast
If the scanner is installed at the same height as the smoke-stack or mast, radar
waves may be blocked, crating shadow zones or generating false echoes.
Therefore, do not install the scanner at such a position.
C.
Install scanner forward away from obstacle
To avoid creating shadow zones or generating false echoes, install the
scanner at a position nearer to the ship’s bow away from obstacles. When
installing the scanner on a mast, position it in front of the mast. (If obstacles
cannot be avoided for the ship’s structural reasons, refer to “Shifting away
from obstacles” described in section 9.9.1.
D.
Do not install the scanner near hot or heat-generating items
Do not install the scanner at a position where it may be subjected to smoke or
hot air from smoke-stacks or heat from lamps.
E.
Install the scanner away from antennas or other equipment
Install the scanner as far away as possible from the antennas of a direction
finder, radio transceiver, etc..
F.
Make the cable length as short as possible
Keep the distance from the scanner to the display within the standard cable
length of 10 meters. If using a longer cable for unavoidable reasons, limit the
cable length to a maximum of 100 meters.
