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

To approach something from upwind

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.

Old seafaring term meaning something very difficult or awkward. see Devil

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

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

see Watch

A disturbance of surface water by conflicting current or by winds.

The north end of the earth's axis and also called North Geographic Pole. The direction indicated by 000

Air cylinder

A pole used as part of the sailboat rigging, such as masts, booms, gaffs, yards, etc. A vertical spar is a mast.

Temperature at which condesation first occurs and moisture is formed.

A term commonly used in connection with a bill of lading. It involves the transfer of rights, title and interest in order to assign goods by endorsing the bill of lading.

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

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

Dispute Settlement Understanding

The distance the ship's side falls in towards the center line above the load water line. Opposite of flare.

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

A label required on shipments of flammable articles.

Articles handled only under certain conditions.