Onwa Marine Electronics KAP-866 - Manual (Page 28)

There are two types of compass suitable for this autopilot - a magnetic sensor
unit (fluxgate), which is a complete compass, and the compass-top sensor
(CTS), which is used together with a standard magnetic ships compass.
3.3.1 Installing a Compass-Top Sensor (KCS-20)
The sensor unit placed on the glass plate of the ships compass, in the exact
centre of the compas card and secured with an adhesive such as double-sided
tape or silicon sealant. Before fixing the sensor in place, align it carefully so
that the KAP-866 compass displays the same bearing as the ships compass.
The compass top sensor is preferred for steel hull vessels provided a suitably
compensated compass is fitted to the vessel.
3.3 Installation of Compass
Bow
Parallel travel
Bow
Compass sensor
Compass sensor
Compass
Keel line
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