GL: Swinging

[John & Judy Gill]

Coral,

The easiest way to create a compass deviation chart for your boat is  
to use a good GPS and put your boat in a shallow bay where you can  
swing it in a circle with one or two persons at the bow and one or  
two persons at the stern.  Have someone watch the compass every 5  
degrees and mark the GPS heading.  Do it a couple of times for accuracy.

John

=========================================================
On May 28, 2009, at 8:03 AM, Coral Hadler wrote:

> We discovered yesterday how much it costs to have a professional  
> "swing our
> compass" and decided we would try it ourselves, first.
> Can somebody please recommend books or articles on the "best"  
> method to do
> this?
> Thanks,
> Sue
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