Handsomely—Steadily; carefully.
Handy billy—A watch tackle kept on deck for getting a pull on sheets or halyards.
Hanks—Rings or hooks for fastening the luffs of sails to stays.
Hard down—The order to put the tiller a-lee. Hard up, the order to put the tiller a-weather.
Heave to—To so trim a vessel's sails that she does not move ahead.
Heel rope—The rope by which a running bowsprit is hauled out or a topmast lowered.
Hoist—The length of the luff of a fore-and-aft sail.
Horns—The projections forming the jaws of gaffs or booms.
Hounds—The projections on a mast that support the lower cap and rigging.
House—To lower a topmast down within the cap.