Furuno 1712 installation manual Antenna Unit Installation, Mounting considerations

1. INSTALLATION

1.1Antenna 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. A mast, for instance, with a diameter considerably less than the width of the antenna unit, will cause only a small blind sector. However, a horizontal spreader or crosstrees in the same horizontal plane would be a much more serious obstruction; place the antenna unit well above or below it.

Antenna unit

Antenna unit

Figure 2 Typical antenna unit placement on

powerboat

•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.

•The compass safe distance of 1.25 meters (standard compass) and 0.85 meters (steering compass) should be observed to prevent deviation of the magnetic compass.

Antenna unit

Antenna unit

Figure 1 Typical antenna unit placement on

sailboat

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