"In Irons."—A yacht is said to be "in irons" when she has lost steerage way from any cause, and will not obey the helm.
Jack-Stay.—A small bar of iron, or slat of wood, fastened to a spar, and to which the sail is bent.
To Jam.—A knot is said to be jammed when it cannot be untied.
Junk.—Old pieces of rope, canvas, &c.
Jury-Masts.—Temporary masts used when others are carried away.
Jibing.—The act of passing the main-boom from one side of the yacht to the other, whilst running before the wind.
Keel.—That part of the yacht lowest in the water, and upon which all her superstructure is erected.
Kink.—A twist or turn in the rope.
To Labor.—A yacht is said to labor when she pitches and rolls heavily in a sea-way.
Land-Fall.—Discovering the land.