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

Screen of cloth or other material to give the crew protection against the weather, wind and water spray.

see Bream

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.

The settings on a pressure switch used to either load or unload the air compressor on a constant speed application, or start or stop the compressor on a start/stop application. The cut out pressure is also known as the maximum pressure, or the point at wh ...

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" ...

Under ICC and common law, the requirement that a rate not be higher than is necessary to reimburse the carrier for the actual cost of transporting the traffic and allow a fair profit.

Any point of sail with the wind coming from the side of the boat. If the wind is coming from directly over the side, it is a beam reach. If the wind is coming from forward of abeam it is a close reach. If the wind is coming from over the quarter, it is ca ...

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

The unofficial filtration industry description for filters designed to trap small size contaminants.

The ratio of the isothermal power consumption to shaft input.

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

(1) The transverse measurement of a boat at its widest point. Also called breadth. (2) One of the transverse members of a ship's frames on which the decks are laid.

A form of steam engine where a piston moves back and forth inside a cylinder, transmitting its motion to a driving shaft by a connecting rod and crank.

Heavy, linked chain secured to an anchor for mooring or anchoring.

Chocks which hold and anchor in place either in a locker or on deck.

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

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.

Shipment of goods to a foreign country.

Said of a distant ship when her hull is below horizon and her masts and upper works are visible.