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From the famed missile-guidance-systems tutorial:  "The missile knows where
it is by knowing where it isn't."

Now I believe with 99% certainty that there is a 75% chance I am not where I
think I am if I think I am within the cocked hat.  And with diminishing
probability I can be anywhere on the surface of the earth EXCEPT in the
clocked hat 3 out of 4 times.

Also, if I have used celestial objects within a 180 azimuth range, AND I
know of  personal or systematic errors then I bisect the LOP's to find my
position which almost certainly will be outside the cocked hat.

Also that bridges and underpasses may ice up before the road surface.

"The sublime and the ridiculous are often so nearly related that it is
difficult to class them separately.  One step above the sublime makes the
ridiculous, and one step above the ridiculous makes the sublime
again."--Thomas Paine

The academic analysis, now a running gun battle in a corner is enlightening.
Certainly a warning to the prudent navigator to not bet the ship, her cargo
and souls on the fix if potentially in harms way.  In the bigger picture is
the goal to coastal pilot and/or find your lobster pots via cel nav? Or
perhaps find your way across a large expanse of water and make landfall then
work on your short game?  In either case, wayfinding and other clues (a
prudent navigator makes use of all available information) might be useful.

As this thread continues on ad infinitum, please keep in mind the following:
"I used to be into necrophilia and bestiality....but then I realized I was
just beating a dead horse.--The Cellar Restaurant, VA

Bill


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