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Raymarine forum / Raymarine Forums / Autopilots v / Heading COG Mismatch (E125/ACU400/EV-1/P70/I70)

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Heading COG Mismatch (E125/ACU400/EV-1/P70/I70)
06-10-17, 02:04 PM
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lwitty Offline
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Heading COG Mismatch (E125/ACU400/EV-1/P70/I70)
Hello,

Most of the time, my heading and COG is accurate, however on occasion the heading will be off by 90 degrees or more on all instruments. I began to experience this problem with my old S3 and Fluxgate. I first replaced the Fluxgate and had the same issue. I then removed the S3/Fluxgate/NG converter (now all NG network with exception of NMEA AIS) and replaced with an ACU400 and EV-1, the problem still exists.

Photos attached show the problem. These were approx 5 mins apart with the autopilot set to a fix heading (note autopilot did not turn the boat when heading changed so it seems the correct somewhere but displays incorrectly).

Not sure what to do next, any thoughts?
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Heading COG Mismatch (E125/ACU400/EV-1/P70/I70) - lwitty - 06-10-17 02:04 PM

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