raymarine boat position is 180 degrees off - Page 2 - SailNet Community

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Old 10-19-2011
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Seatrial Calibration is the answer.

My Raymarine Autopilot ST600+ did the same trick on me today, it was showing exactly a reciprocal of the course steered, and worked as an basic autopilot but when asked to steer a route it changed course by 180 degrees!

Re-booting both the instruments and my Raymarine course computer (RL70C) did not fix the problem.

After reading this post I performed the "Seatrial Calibration" as described in the Owners Handbook, motored 2+ circles taking over 2 minutes for each, completed the deviation correction and then the autopilot allowed me into the "Autopilot Heading" alignment screen. Motored in straight line for about 1 minute then hit "auto" and the COG from the GPS was accepted as the heading.

Thanks to previous posts for the encouragement. I have no idea why this fault developed as the kit has performed flawlessly for the last 4 tears/10,000 miles?

SY Susanne
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