NavList:

The three star sights each produced "cocked hats" of varying sizes. I used the incorrect but convenient method of bisecting the angles to arbitrarily locate the "fix" for each reduction method. There has been much discussion of the cocked hat conundrum in the past. With the exception of the NASR "hat", each reduction method produced the possibility of the fix being within 5 miles or less from the GPS. Blunders are always a possibility of course. It was my curiosity as to the diffrences in each methods handling of the same sight data that prompted me trying this. Just for fun, I have a more recent sight run with USNO intercepts from GPS of less than a mile. If you're interested, try to plot all 5 methods on the same page. It occurrs to me using clear plastic overlays successively might mb clearer. Here goes:
12 January 14
DR (GPS) lat 35*19.4 Lon 119* 05.5
Watch error zero
IC -0.3
ZD +8
Mirror artificial horizon
Capella Hs 110* 47.0 at 18-47-44 a 0.7
Deneb Hs 54* 30.4 at 18-49-40 a 0.8
Diphda Hs 63* 23.2 at 18-51-11 a 0.2
Always remember the possibility of (my)blunders
Randy

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