Sorry Thom, but I still don't get it.

Lets say I wanted to visit my girlfriend, and she lives on an island
just west of my island. There is a lot of reefs in the area so to stay
clear I calculate a trip-plan that will bring me to her by sailing 14
hours east, 14 hours north, 14 hours west and 14 hours south. Since
there is no tide and no wind and the water is totally flat, I have to
use my twin engines (asymmetrical). Every thing goes as planed and
after 56 hours I arrive at my destination.

Would you still call the Vector from my start-point to my destination
for drift, current or any such thing?

Peter S/Y Anicula

P.S. Please, don't ask me how the reefs survive if there is no wind no
current and no waves.



"Thom Stewart" skrev i en meddelelse
...
Yes Peter,

You're correct in what you've said but again you've deviated from
the
origin problem. It doesn't matter THIS TIME!

Pete, this is and old trick question. used in teaching GREAT CIRCLE
NAVIGATION.
(Sorry Bart) Another explaination "Is a fat man wearing his belt
under
his gut because the distance around his stomach is to large.

If the four legs were sailed in a vacuum, without tides and currents
but
on a globe the start and finish would still be different. Since most
DR
Navigation call the difference (Off Set) between start and finish
Drift,
That was the term I used.
The etc was used to let Bart have his fun.

Horv, I know it doesn't make a difference in Units in this problem
but
it did to Jax's conception.

Ole Thom