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Old 06-18-2011
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Every time I swing my Raymarine fluxgate I get the message that the deviation is more is 13 degrees or so and therefore cannot auto calibrate. The compass reading is always at least 15 degrees out from my magnetic. The fluxgate is on the center line, about six foot from engine and is mounted on a xbeam under the sole above the water bladder. Other than buy a new fluxgate I don't know what else to do.
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Old 06-18-2011
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Try moving the compass to a different location and see if that reduces the deviation.

Swinging the compass and aligning the compass are two different calibrations. If your autopilot heading does not agree with your magnetic compass, you need to make the correction in the setup program, usually called aligning the compass.

This is different from "swinging" the compass.
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Old 06-20-2011
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Viking1, I seem to recall that error as the same kind I got when my fluxgate compass was malfunctioning. You should check the resistance readings on the various wires from the compass (needs to be disconnected from the auto pilot computer) using a multimeter. Raymarine's website has the readings you should get from a correctly functioning compass. X

It's easy to do and will tell you right away if the compass is the problem or not.

Here's a link to the relevant info on the Raymarine site:


Last edited by mherrcat; 07-20-2011 at 02:35 PM.
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