Is the compass mirror usable outside North America?
12-09-2003, 02:05 AM
#1
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Is the compass mirror usable outside North America?
I'd like to replace my dimming interior mirror with the version that includes a compass, but all the calibration data is only given for North America.
So if I buy one from e.g. vagparts.com how will I know the correct calibration value to use in the UK?
So if I buy one from e.g. vagparts.com how will I know the correct calibration value to use in the UK?
12-09-2003, 10:39 AM
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I thought magnetic variation only accounted for ~10 degrees variance?
Since the compass is only accurate to 45 degrees, I wouldn't think it would make any difference practically. You'll always know you're in the correct quadrant, you'll just be wrong on which half of it you're in, about 1/4 of the time.
12-11-2003, 02:58 PM
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Right, and out here it's 20 degrees, but having a compass that
compensates for it should result in accurate readings, even at magvars > 10 degrees, as proposed by AvramD. The variation in Alaska is upwards of 40 degrees, but my compass still works there if properly calibrated.
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