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2/11/2019 12:41 am  #1


How does Expedition uses GMM versus Instrument data

With the update of the GMM in Expedition I was wondering when Exp uses the GMM to calculate magnetic variation and do conversions between (e.g. HDG/HDG Mag,   COG/COG M etc) and when it uses the variation data that comes from the instruments.

 

2/11/2019 1:21 pm  #2


Re: How does Expedition uses GMM versus Instrument data

Exp stores everything internally in magnetic. If you decide to show a variable in true, it applies the variation from the WMM to that.
Exp ignores any variation from the instruments.

 

2/11/2019 1:25 pm  #3


Re: How does Expedition uses GMM versus Instrument data

Tnx Nick!

     Thread Starter
 

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