Since I am working on a version of GPS4PPC for marine navigation I thought I should look at the MagneticVariation property of Gpsdriver.
My ancient Garmin GPS-II+ returns 4.2 whereas my slightly younger yellow Etrex gives 2.8. (The built-in Sirf chip in my PPC PDA does not offer MagneticVariation.)
But I believe that MagneticVariation for the UK should be westerly which by the usual convention (and that stated for Gpsdriver) should be negative for westerly.
Does anyone see a negative value for MagneticVariation from their GPS in the UK?
Mike.
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