DICTIONARY OF

Buttock 62 By the Wind
Buttock. Overhanging and rounded-in part of a vessel's stern. It commences aft and
terminates, on either side, where it merges into the run.
Buttock Lines. Curves derived from a series of longitudinal sections of the hull of a vessel
by vertical planes parallel to keel and at uniform intervals from it. They thus indicate the
transverse form at any given thwartship position.
Butt Sling. Length of rope with eye splice in one end and whipping on other end.
Butt Strap. Piece of metal covering a butted joint. Riveted to each of the butted plates to
regain strength lost by the butting.
Butt Weld. The joining of two members by putting their edges closely in contact and
welding along the seam.
Buys-Ballot's Law. Originally stated that if observer's back is to a wind in Northern
hemisphere then barometric pressure will be lower on his left hand than on his right; this rule
being reversed in Southern hemisphere. Modern convention assumes man faces direction of
wind, thus reading 'higher' for 'lower' in original rule.
By. Used with other words, in sailing, to mean close to the wind.
By and Large. Sailing with wind before the beam - and sailing with wind abaft the beam.
2. A nautical way of saying, Taking the rough with the smooth' or 'striking a mean'.
By Points. Those points of the compass that contain the word 'by'.
By the Board. Overboard and by the ship's side.
'By the Deep.' Erroneous report sometimes made by leadsman when depth is judged to be
an exact number of fathoms not marked on line. Should be 'Deep'.
By the Head. Said of a vessel when her draught forward exceeds her draught aft.
'By the Mark.' Prefix to a leadsman's report of depth when the mark on a vertical lead line
is at water level; this report being free from estimation.
By the Run. To let go a rope and let it run without hindrance.
By the Stern. Said of a vessel when her draught aft exceeds her draught forward.
By the Wind. Said of a vessel sailing close hauled.
C 63 Cable Nipper