Having no sails up. In heavy weather the windage of the mast and other spars can still be enough to move the boat.

Overhanging part of a vessel's stern. The area of the upper deck of a ship that is nearest the stern.

The date on which a Bill of Exchange or Letter of Credit becomes due for payment.

An order placed with a broker to purchase or sell stock, a commodity or financial instrument at.

The ability of a boat to keep from being moved sideways by the wind. Keels, daggerboards, centerboards, and leeboards are all used to improve a boat's lateral resistance.

A method of docking with a boat's stern to the dock.

A general term for instruments designed to measure the amount of cloudiness.

Power Take Off

Search of a vessel, by Customs authorities, for unreported goods.

A pair of dissimilar conductors, commonly metals, in electrical contact. See also galvanic corrosion.

A vessel with permanently installed cranes designed principally for lifting operations.

The range of the stress-intensity factor during a fatigue cycle.

Temperature of equilibrium between the liquid and vapor phases of a substance at a given pressure.

A type of heat pump that transfers heat from outdoor air to indoor air during the heating season, and works in reverse during the cooling season.

For gauging purposes a transverse section including all longitudinal members such as plating, longitudinals and girders at the deck, side, bottom, inner bottom and longitudinal buklheads.

A sprocket wheel on the windlass for taking links of the chain cable.

The true freezing point of water. The temperature at which a mixture of air-saturated pure water and pure ice may exist in equilibrium at a pressure of one standard atmosphere.

An apparatus for converting the energy available in the wind to mechanical energy that can be used to power machinery (grain mills, water pumps) and to operate an electrical generator.

The destruction of adhesion between a coating and the surface coated.

Any one of numerous devices for the measurement of either speed alone or of both direction and speed (set and drift) in flowing water.