2-44
• If it is considered that sufficient installation height cannot be provided when
the scanner is installed directly on the roof of the wheelhouse, use a mounting
rack or radar mast (Fig 2-16). Normally, when the scanner installation height
is less than 2 meters from the roof of the wheelhouse, provide a mounting
rack assembled at an angle frame to install the scanner. When the scanner
installation height is 2 meters or higher from the roof of the wheelhouse,
provide a cylindrical radar mast to install the scanner. Consider the
convenience of the service staff who takes care of installation, maintenance,
adjustment, and repair of the scanner by providing adequate footholds to the
mounting rack and the radar mast.
Fig 2-13 Mounting rack and mast fr the scanner
• When installing the scanner, select a location where there are the fewest
structural objects in the surrounding area so that false images which interfere
with target detection will not be generated by signal reflection from other
scanners, deck structures, and cargo. As a guide, note that structural objects
should not exist within the range of the vertical beam width (Fig 2-14).
Vertical beam width of X-band: Approx. 20° (±10.0° when the height of the
radiating section is 0°)
Vertical beam width of S-band: Approx. 25° (±12.5° when the height of the
radiating section is 0°)
Fig 2-14 Scanner and the surrounding structural objects
ビーム幅
Beam width
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