HEAVING DOWN. (See [Careening].) The bringing one of a ship's sides down into the water, by means of purchases on the masts, in order to repair any injury which is below her water-line on the other.

HEAVING IN. Shortening in the cable. Also, the binding a block and hook by a seizing.

HEAVING IN STAYS. The act of tacking, when, the wind being ahead, great pressure is thrown upon the stays.

HEAVING KEEL OUT. The utmost effect to be produced by careening, viz. to raise the keel out of the water in order to repair or clean it. (See [Heaving Down].)

HEAVING OUT. The act of loosing or unfurling a sail; particularly applied to the staysails; or in the tops, footing the sail out of the top.

HEAVING TAUT. The act of turning the capstan, &c., till the rope applied thereto becomes straight and ready for action.

HEAVING THROUGH ALL. The surging or slipping of the cable when the nippers do not hold.

HEAVY DRIFT-ICE. Dense ice, which has a great depth in the water in proportion to its size, and is not in a state of decay, therefore dangerous to shipping.

HEAVY GALE. A strong wind, in which a ship is reduced to storm-staysails and close-reefed main-topsail. Force 10.

HEAVY METAL, or Heavy Ordnance. Ordnance of large calibre.