Mic wrote:

LINK
http://members.shaw.ca/taonui/windvane.html

"windvane acts like a helmsman and keeps the sails performing at
maximum efficiency by following the wind as it oscillates and/or as
the boat rides up and over the waves. The autopilot tries to force a
fixed course, and the sails are inevitably luffing or overtrimmed
relative to the changing wind."

Not to put too fine a point on it, but what did this gentleman expect would
happen?.

--
Good luck and good sailing.
s/v Kerry Deare of Barnegat
http://kerrydeare.home.comcast.net