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					Originally Posted by  Dave Newcomb
					 
				 
				In an armored vehicle it is tricky.  Aircraft have a painted 'rose' at the airport.  orient the vehicle on the 'rose', and correctly calibrate the vehicle compass. make you own 'rose'  on the ground.  Newc 
			
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 Good point. I read the installation paper for mounting this compass in the Fox and it says you have to try various locations to avoid the obvious magnetic attraction. It stopped short of offering suggestions where those might be hence the detective work.