ComNav 1101 Autopilot4 - 12 INSTALLATION
Compass Installation
The 1101 Autopilot is normally supplied with either a ComNav
Fluxgate Compass or a magnetic compass with a ComNav Magnetic
Compass Sensor. The choice of compass depends on the type and
intended use of the vessel. Refer to the appropriate section below
for installation instructions for your compass.
When first installed, most compasses will have a deviation which is
the error between the compass reading and the vessel’s actual
heading. Deviation is a result of magnetic fields induced in the
vessel’s hull (for steel vessels) and fields from objects such as
engines, davits, galley equipment, etc. If you have a ComNav
Fluxgate Compass, the 1101 Autopilot can compensate for the
deviation. This is done during the Sea Trials. If you have a magnetic
compass, it will have to be manually compensated. This job is often
done by a professional compass adjuster.
If you intend to use a fluxgate compass other than a ComNav
Fluxgate Compass, or if you are using a magnetic compass not
supplied by ComNav, you should contact your dealer or the factory
for instructions on how to install and setup your compass.
ComNav Fluxgate Compass
Choose a location for the Fluxgate Compass.
For best performance, the Fluxgate Compass must be mounted as
close as possible to the vessel’s center of pitch and roll. This is
typically low in the vessel, at or about the waterline, and slightly aft
of the center of the vessel.
You must keep the compass at least 1m (about 3’) away from
engines, electric motors, and other magnetic objects.
Temporarily mount the Fluxgate Compass. Holes are provided to
attach the Fluxgate Compass to either a bulkhead or to a horizontal
shelf or deck. The compass must be mounted parallel and as close
as possible to the centerline with the arrow labeled “BOW” pointing
forward. The cable should be coming out of the top of the unit.
NOTE: DO NOT PERMANENTLY INSTALL THE COMPASS UNTIL SEA
TRIALS ARE COMPLETE AS THIS PROCEDURE MAY INDICATE THE
MOST APPROPRIATE LOCATION FOR ACCURATE INTERFACE WITH
THE AUTOPILOT.
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