Seiwa MDS-18910R - Manual (Page 12)

MDS-1R/8R/9R/10R Installation
3 Installation
3.1 Installation Considerations
Prior to actual installation of the RADARpc scanner unit, several factors must be considered to
assure maximum performance. The scanner must be located so that passengers and crew are
not exposed to the direct radar beam. To comply with FCC RF exposure requirements, the
radar antenna for this scanner must be installed to provide a separation distance of 0.5 m or
more from all persons. The scanner unit should be mounted on the center line of your vessel in
a location that has an unobstructed view forward and is as clear as possible the rest of the way
around the unit. A location as high as practical to improve maximum range is desirable,
keeping in mind that minimum range objects may be overlooked if mounted too high. Position
the unit forward of large structure and exhaust stacks. Large structure or stacks cause blind
spots. Contamination from engine exhaust on the scanner housing reduces radar
performance.
Antennas for GPS, radio communication or other equipment should not be in the radar beam.
Use non-metallic extension poles to move the active area of antennas above the radar beam.
In selecting a location, consider the suitability of the mounting surface. It must be flat and
approximately level with the vessel’s water line. The surface must support the weight of the
scanner and have access to the under side for installation of the four mounting bolts.
c Shifting from keel line
By shifting the scanner position from the keel line to the starboard side of the boat, it is
possible to move shadow zones to the port side. This makes it possible to keep a clear view
to the bow. The distance to be shifted can calculated using the following equation:
Ls=0.4R+D/2 [m] (when R<15m)
Ls=0.025R+D/2 [m] (when R>=15m)
where Ls = distance to be shifted from keel line
D = diameter of obstacle on keel line
R = distance from scanner to obstacle
Ls
R
D
Keel
Obstacle
Scanner Unit
Fig.3-1 Shifting from keel line
9