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Carwil compass

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Well-Known Member
Aug 1, 2007
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My J-3 Cub has a Carwil magnetic compass, the type with a tiny bakelite "drawer" that slides out of the front of the compass after removing a retainer screw. The piece of bakelite has 3 holes in the front and 3 in the back, which contain 3 tiny pin-like magnets that are, presumably, jockeyed around to adjust deviation after the compass is installed. My question is ... how? What's the procedure? Which holes adjust E-W deviation and which ones adjust N-S?
I'd sure appreciate any advice on this!


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