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1.2 Mounting of Antenna Unit for
MODEL 1722/1722C/1732/1732C/1723C/1733C
1.2.1 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
Antenna unit
Antenna unit
Typical antenna unit placement on sailboat and 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 (1722/1722C/1723C), 0.9 (1732/1732C/1733C)
meters (standard compass) and 0.85 (1722/1722C/1723C), 0.7 (1732/1732C/1733C)
meters (steering compass) should be observed to prevent deviation of the magnetic
compass.