Inhaul—The rope used to haul sails inboard.
In irons—The condition of a vessel head to wind and with way lost, unable to pay off on one tack or the other.
Irish pennants—Loose ropes flying in the breeze or dangling over the side.
Jackstay—A rod of iron, a wooden cleating, or a wire rope for sails or yards to travel on; also a wire rope on the main boom to which the foot of the sail is laced.
Jiggermast—The mizzenmast of a yawl or dandy.
Kentledge—Pig iron used as ballast.
Lanyards—Ropes rove through deadeyes by which shrouds or stays are set up.
Leeboard—An old-fashioned contrivance to check leeway, still in use on some Dutch vessels and English barges.
Load water-line—The line of flotation when a vessel is properly ballasted or laden.
Luff—To come closer to the wind.