Furuno 1815 - How to Install the Antenna Unit

1. INSTALLATION
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1.3 How to Install the Antenna Unit
Select a mounting location for the antenna unit considering the following points.
• Install the unit on a common mast, radar mast. etc.
• Install the antenna unit on a solid location, for example radar arch or on a mast on
a platform. (For sailboats, a mounting bracket is optionally available.) You must put
the antenna unit where there is a good complete view. Make sure that no part of the
superstructure is within the scanning beam. Any obstruction causes shadow sec-
tors. For example, a mast with a diameter smaller than the horizontal beam width
causes only a small blind sector. A horizontal spreader or crosstrees in the same
horizontal plane creates a large obstruction. Install the antenna unit above a hori-
zontal spreader or crosstrees.
• To avoid electrical interference, do not run the antenna cable near other electrical
equipment. Also do not run the cable in parallel to power cables.
• Do not install the unit where its motor noise may affect crew or passengers.
• As much as possible install the unit on the ship’s centerline, to prevent misplace-
ment of echoes (wrong bearing) on the display.
• Make sure the mounting location does not allow water to accumulate at the mount-
ing platform.
• A magnetic compass will be affected if the display unit is placed too close to the
compass. Observe the compass safe distances in the safety instructions to prevent
interference to the compass.
• Do not paint the radome.
• Be sure to follow the recommended maintenance space shown in the outline draw-
ing at the back of this manual.
• If the unit is installed on a large vessel observe the following points.
• The antenna cable comes in lengths of 10, 15 and 20 m. Consider the length of
the cable when selecting a mounting location.
Mounting on a sailboat Mounting on a power boat
AntennaAntennaAntenna
AntennaAntennaAntenna
Rear view
Rear view
Horizontal beam width
12.5°
12.5°
Rear view