Any object used to increase the drag of a boat and slow her down. Typically shaped like a parachute or cone opened underwater, drogues decrease a boat's speed in heavy weather. Also see sea anchor.

A gas produced by many fruits and vegetables that accelerates the ripening and aging processes.

A ring-shaped fitting into which the rudder pintle is inserted which allows the rudder to pivot.

A four sided sail bent onto a yard. Similar to a gaff sail, but with a wider throat.

A fitting around the propeller shaft to keep the bearing lubricated and to keep water out of the boat.

The use of a sound barrier separating the sound from the receiver.

A vessel whose bow and stern have drooped. The opposite of sagged.

A propulsion system for boats with an inboard engine operating an exterior drive, with drive shaft, gears, and propeller; also called stern-drive and inboard/outboard.

see Watch

Complete encirclement of a cleat, bollard, pin or winch by a line.

A small flat boat, usually inflatable.

The curved part of a ship's hull where the side and the flat bottom meet.

A pressure below that of the existing atmospheric pressure taken as a zero reference.

Sailing with the motor on and in gear

Old Latin name for the south wind.

To let go.

Sailor's name for a block of sandstone used for scrubbing the wooden decks of a ship; seamen had to get down on their knees to use them. Large holystones were known as "Bibles", while smaller blocks to reach awkward places were known as "Prayer Books" ...

The standard atmosphere is defined as the pressure exerted by a column of mercury 760 mm high with a density of 13,595 g/cm

To coil flat down on deck, each fake outside the other, beginning in the middle and all close together.

The maximum rate at which an engine can do work as measured by the resistance of an applied brake. Expressed in horsepower.