I have reworked the wiring in accordance with the instructions at the Bildr Blog. The wiring makes a hell of a lot more sense. With some small modifications the code found on the site I was able to get a reading from the compass.
My goal has now become to get the compass reading into NMEA0183 format. For the most part I have been able to get the correct output, but I can't get the checksum to calculate in order for an NMEA listener to recognise the data and use it.
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