Antenna Unit Installation, Mounting on a platform

3. INSTALLATION

3.1 Antenna Unit Installation

Mounting considerations

When selecting a mounting location for the antenna unit keep in mind the following points:

•Install the antenna unit on the hardtop, radar arch or on a mast on an appropriate platform. (For sailboats, a mounting bracket is optionally available.) It should be placed where there is a good all-round view with, as far as possible, no part of the ship’s superstructure or rigging intercepting the scanning beam. Any obstruction will cause shadow and blind sectors.

•In order to minimize the chance of picking up electrical interference, avoid where possible routing the antenna cable near other electrical equipment onboard. Also, avoid running the cable in parallel with power cables.

•Separate the antenna unit from a magnetic compass by the distances noted below to prevent interference to the magnetic compass:

Standard compass: 1.25 m

Steering compass: 0.95 m

Mounting on a platform

1.Remove the mounting hardware at the bottom of the antenna unit: four each of hexagon head bolts (M10 x 20), spring washers and flat washers (4 pcs.). Save the mounting hardware to use it to fix the antenna base to the mounting platform.

Screws

(one screw on other side)

Flat washer

Spring washer Hexagon head bolt (M10 x 20)

Antenna unit, showing location of

mounting hardware

2.Construct a wood, steel or aluminum platform on which to fix the antenna. (The thickness of the platform depends on the hex bolts to be used to fix the antenna to the platform. See the illustration on the next page for thickness). Next, position the antenna unit on the platform so the cable entrance faces the stern direction.

205

160

	Fixing hole
	(φ 11 mm)
160
235
Dimensions in	BOW
millimeters

Dimensions of antenna platform

Note 1: If corrosive material is used for the platform, be sure to take appropriate anti-corrosion measures.

Note 2: When drilling holes in the platform, be sure they are parallel with the fore and aft line.