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    Re: GPS direction: Rumb line or great circle
    From: M v Noorden
    Date: 2009 Oct 5, 00:47 -0700

    Thanks!
    That was what I expected it to do, now I am sure
    
    Regards,
    
    Maarten van Noordem
    
    On Oct 3, 1:42�pm,  wrote:
    > I was reading the post on the mecca direction question and was
    > wondering; when a (Garmin) GPS indicate a direction, does it follow a
    > rumb line or a great circle?
    >
    > GPS uses spherical trigonometry so the answer is Great Circle.
    >
    > A rhumb line is a special curve called a loxodrome which spirals out from 
    pole to pole. �It has the special property of maintaining a constant angle to 
    the meridians. Hence on a mercator chart it is a straight line from place to 
    place.
    >
    > Douglas Denny.
    > Chichester. England.
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