The Collaborative International Dictionary of English v.0.48:
Loof \Loof\ (l[=oo]f or l[u^]f; 277), n. [See Luff.] [Also
written luff.] (Naut.)
(a) Formerly, some appurtenance of a vessel which was used in
changing her course; -- probably a large paddle put over
the lee bow to help bring her head nearer to the wind.
(b) The part of a ship's side where the planking begins to
curve toward bow and stern.