ComNav 1101 Autopilot4 - 18 INSTALLATION
Heading Output Interface
The 1101 Autopilot system provides heading information in both
NMEA 0183 and Furuno AD-10S formats. The information is
available in all modes of operation (except DOCKSIDE SETUP)
whenever there is a valid signal from the compass. The Autopilot
transmits the information at a fast repetition rate so that it can be
utilized by compatible radar and ECDIS systems.
Included with every 1101 Autopilot system is a 3m (10’) cable
(Part # 81608) fitted with a connector that can be plugged into the
HEADING OUTPUT receptacle on the SPU. Unused wires should have
their tinned leads cut off and the wires should be taped back
against the cable.
The following table lists the color and function of each lead:
Cable Plug Pin # Wire Color Function
1 Blue AD-10S Clock
2 Red Not used
3 Black Not used
4 Shield Drain Wire AD-10S Common/
NMEA 0183 Shield
5 White Data (+) Signal for
NMEA 0183
6 Yellow AD-10S Data
7 Green Data (-) Return for
NMEA 0183
Table 4—Connections for Heading Output Cable
NMEA 0183 Output
The 1101 Autopilot outputs the HDG sentence at the rate of 10
times per second.
HDG sentence structure provides for magnetic sensor reading,
deviation and variation. However, since the Autopilot cannot know
the deviation and variation for a given location, the information is
transmitted as “null” (empty) fields, per the NMEA specifications.
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