Introduction
20220596E 13
1.8 Heading Sensors
The AP21 and AP22 autopilots can be used with the following
combinations of heading sensors:
RFC35 Electronic Fluxgate Compass
A compact heading sensor from Robertson with 15 m (45 feet) of
cable. The direction of the earth's magnetic field is sensed by a
floating ring core in a fluxgate coil and transformed to a digital
signal read by the autopilot steering computer.
RFC35R Rate compass
Fluxgate compass with integrated rate sensor. Provides a
dramatic improvement to the dynamic performance of both the
autopilot and a stabilized radar display when connected to the
autopilot system.
Same dimensions as RFC35.
CDI35 Course Detector Interface and CD100
Course Detector
Interface and sensor unit to connect AP21 and AP22 to a
magnetic compass. The autopilot provides excitation current for
CD100 and converts the analogue sin/cos signal to digital two
wire format for the autopilot steering computer.
Note ! You can not connect both an RFC35 and a CDI35 at the same time.
Other fluxgate compass models
The optional CI300X can interface AP21 and AP22 to fluxgate
compasses with heading signal on a sine/cosine format.
Robertson RGC10 and RGC50 gyrocompasses
The optional CI300X unit is needed to interface the two
gyrocompass models. No other gyrocompass models can be
interfaced to AP21 and AP22.
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