Air cylinder

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.

Old Latin name for the south wind.

Rum diluted with water. In the 1700s the daily ration of rum in the British Navy was diluted with water with the idea of reducing drunkenness. The term groggy was derived from the effects of drinking too much grog.

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

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

When a ship's head or stern pitches suddenly and violently into the trough of the sea.

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

A sound signal device (not necessarily mechanically operated).

(1) To lay a line out in coils so that it can run without fouling. (2) Folding a sail in layers on the boom.

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" ...

Covered tunnels within a ship through which the tail shafts pass.

The locker in which the bos'n keeps his deck gear.

Amount of time for a compressor to complete one cycle.

A metal appliance consisting of a thread and screw capable of being set up or slacked back and used for setting up on rigging.

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

Usually refers to a rating that applies to an article regardless of size or quantity.

To haul on a rope, to haul up tight, to hoist the last possible inch or so.

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

Shipment of goods to a foreign country.