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Sea Kayak Trips Bulletin Board
Re: Compass Question
Posted By: Nick Schade In Response To: Re: Compass Question (Dave Sharpe)
Date: Saturday, 19 June 1999, at 9:28 a.m.
> I made the mistake of using a Ritchie boat compass - I don't remember
> which model - when I first built my boats. I liked them because they had a
> couple little pins on either side that you could press in and pop the
> compass itself off the housing for storage. What I didn't realize was that
> the housing has a couple of short bars with tiny magnets at each end tha
> have to be precisely adjusted to get a corrected reading. Now this is fine
> if you need to adjust for declination (the difference beetween magnetic
> and true north),...The little bars are not for adjusting for declination. They are for correcting for the magnetic properties of the boat. Larger boats have a big chunk of iron (the motor) which will affect the compass.
Declination is corrected by adding the correction given on your chart.
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