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