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    Re: Fix from 2 Bearings
    From: UNK
    Date: 2003 Jul 11, 11:30 -0400

    On Friday, July 11, 2003 10:43 AM
    Dan Allen  asked:
    ...
    > I sighted Mount Baker at 50 degrees east of North.
    > I sighted Mount Rainier at 140 degrees east of North.
    > The compass was uncorrected for magnetic deviation for these readings.
    >  From http://www.ngdc.noaa.gov/cgi-bin/seg/gmag/fldsnth2.pl the magnetic
    > deviation for this location and date is 18d 47m East.
    >
    >CHALLENGE:
    >
    >Determine the point of observation!
    
    I assume that we are to apply the correction for deviation ourselves...
    
    My FIX was at  48d 32.3'N  122d 44.0'W
    
    I used a spreadsheet I wrote that solves a two-LOP fix using rhumb
    lines determined by mid-latitude. I'm betting that the solution
    using great circles differs by no more than 0.1'.
    
    
    

       
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