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13th February 2006 | 14:29

#3 (permalink)

Saintsman

Joined: Jan 2003

Posts: 906

Likes: 102

From: Southampton

Does a GPS not give you heading? If the GPS triangulates from several satelites and the antenna fixed to the airframe can it not work it out? INS has been used to calibrate compasses before.

However, if it still needs to be swung thats fine.