A line that controls the angle of the sail in its relation to the wind; attached to the clew of a sail to adjust its trim (make the sail the proper shape to catch the wind).

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" ...

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

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

The process of assimilating many small shipments into one large shipment at a central point so that economies of scale may be achieved; to commence discharge of cargo.

To turn the boat away from the wind. Also, Fall Off. The opposite of heading up.

(1) Sailing away from the wind with the sails let out all the way; going with the wind, downwind sailing (2) To allow a line to feed freely. (3) The shape of the afterpart of the underbody of a ship in relation to the resistance it creates going through t ...

The frame of a container constructed to hold one or more thermally insulated tanks for liquids.

Vibration isolation mount. Provides reductions in vibration transmission.

A shipwrecked sailor as compared with one who has been marooned or deliberately put ashore.

The normal working pressure for an air motor (6 bar).

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

(1) The location from which a vessel is steered and its speed controlled; navigation and command center of the vessel. (2) A man made structure crossing a body of water.

A position based on estimations of a boat's position using estimated speed, currents, and the last known position/fix - of the boat.

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

A person or firm who transacts all business in a port on behalf of shipowners or charterers. Also called shipping agent; agent.

To change the course of a sailing vessel.

The difference in depth between high and low tide.

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.

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