Anchor sail to avoid Lindisfarne to sail on and
off, jerking the chain.
The two headsails makes her very sensitive and she
will sail and tack, jerking the chain.
Without the anchor sail she still sails
a bit, but only starting, then the anchor sail at the stern push her back in position.
never jerk the chain and minimise the forces on the chain while not exposing the
beam to the wind.