What kind of sail boat?
What kind of sail configuration?
Might be possible on a Hobie!

On a mast head sloop...... NO!

........caveat is no auxilliary assistance of course.

BTW - your friend isn't as experienced as he believes!

CM


"Blorgad" wrote in message
| The question is, is it possible, under any combination
| of sail, to turn the aft of the boat to windward while at a mooring fixed
to
| the bow?