Haul—To pull.
Heel—A vessel is said to heel when she leans to one side. This term is often confused with careen.
Helm—The tiller.
Hitch—To hitch is to make fast. A hitch is a simple turn of rope used to make fast with.
Hove-to—Brought to the wind and kept stationary by having the sails trimmed so that part of the canvas pushes the vessel backward and part pushes her forward; often confused with lying-to.
Hull—The body of a vessel.
Irons—A vessel is in irons when having lost steerageway she refuses to obey the helm.
Jibing—Passing a sail from one side to the other when a vessel is sailing free.
Keel—The largest and lowest timber of a vessel, upon which the hull is erected.