Simrad AP26 User Manual

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System Description 
20221586B
 13 
floating ring core in a fluxgate coil and transformed to a digital 
signal read by the autopilot steering computer. 
RFC35 can operate as a low cost back-up compass for the AP26 
and AP27 autopilots. 
NMEA compass (optional) 
A well performing compass that outputs NMEA 0183 HDT or 
HDG messages at 10 Hz can be connected directly to the AC20 
or AC40 autopilot computer. 
It is absolutely necessary for the autopilot that the heading rate is 
minimum 10 Hz. 
Simrad RGC10 and RGC50 gyrocompasses 
The optional GI51 unit is needed to interface these two 
gyrocompass models. Ask your Simrad dealer for information.