A large heavy knot usually made in the end of a heaving line to aid in accurate throwing.

Forward. The opposite of abaft.

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" ...

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

A U-shaped fitting closed with a pin across the open ends, the pin sometimes being threaded at one end and sometimes held in place with a cotter pin, and used to secure sails to lines or fittings, lines to fittings, fittings to fittings, anchors to chain, ...

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.

Dispute Settlement Understanding

Heavy weight,which gives a ship stability when the vessel is not carrying cargo.

A publication predicting the time and height of high tide and low tide.

see Bream

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.

The ratio of the isothermal power consumption to shaft input.

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

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

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.

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

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.

Shipment of goods to a foreign country.

(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.