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    Re: GPS direction: Rumb line or great circle
    From: Vic Fraenckel
    Date: 2009 Oct 5, 02:58 -0700

    I believe that the normal GPS receivers actually calculate the
    distance between points and the azimuths to/from each using algorithms
    of the type pioneered by Vincenty and Sodano which are more precise
    than the great circle algorithms.
    
    Vic Fraenckel
    
    On Oct 1, 2:40�am, MvN  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?
    >
    > Maarten van Noorden
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