n. 逆风航行, 纵帆前缘, 船首弯曲部

vt. 将船首朝上风

vi. 驶出上风

Luff \Luff\ (l[u^]f), n. [OE. lof, prob. a sort of timber by
which the course of a ship was directed, perh. a sort of
paddle; cf. D. loef luff, loeven to luff. The word is perh.
akin to E. glove. Cf. {Aloof}.] (Naut.)
(a) The side of a ship toward the wind.
(b) The act of sailing a ship close to the wind.
(c) The roundest part of a ship's bow.
(d) The forward or weather leech of a sail, especially of
the jib, spanker, and other fore-and-aft sails.

{Luff tackle}, a purchase composed of a double and single
block and fall, used for various purposes. --Totten.

{Luff upon luff}, a luff tackle attached to the fall of
another luff tackle. --R. H. Dana, Jr.


Luff \Luff\ (l[u^]f), v. i. [imp. & p. p. {Luffed} (l[u^]ft); p.
pr. & vb. n. {Luffing}.]
1. (Naut.) To turn the head of a vessel toward the wind; to
sail nearer the wind; to turn the tiller so as to make the
vessel sail nearer the wind.

2. (Naut.) To flutter or shake from being aligned close to
the direction of the wind; -- said of a sail.
[PJC]

{To luff round}, or {To luff alee}, to make the extreme of
this movement, for the purpose of throwing the ship's head
into the wind.

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.