Next message: Dr. Geoffrey Kolbe: "Re: Artificial horizons"
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'.
