The operation of swinging round, by means of braces, the yards of a square rigged ship to set the sails more efficiently to the wind.

A structure erected to display a characteristic light as a warning of danger at sea and as an aid to navigation.

Polyethylene or similar substance heat-treated and shrunk into an envelope around several units, thereby securing them as a single pack for presentation or to secure units on a pallet.

The shape or design of a sail.

To gain hydrodynamic lift, causing the boat to lift, rising slightly out of the water so that it is gliding over the water rather than plowing through it, reaching speeds in excess of those normally associated with its waterline length.

The ratio of the real gas isentropic power consumption to shaft input.

Small marlinespike.

Turning out all hands on board ship in the morning, or calling the watch for duty on deck.

Rotative speeds at which rotating machinery-axial or screw lobe-pass through unbalanced operation.

Waterproof clothing.

An invoice provided by a supplier prior to the shipment of merchandise, informing the buyer of the kinds and quantities of goods to be sent, their value, and specifications (weight, size, etc.).

Nautical slang for the engineroom crew. Included the chief engineer, who ran the engine and supervised; oilers and wipers, who lubricated and maintained the engine; and firemen and coal-passers, who fed the steam boilers.

Hinged covers for freeing ports.

See Brokerage.

The container of fresh water for drinking purpose used by the crew; formerly it consisted of a cask.

Heavy canvas used as a covering.

Fresh bread.

The qualified operating pressure which is recommended for a component or a system by the manufacturer.

A legal paper or license of a boat or its captain.

The method by which a racing yacht may object to the actions of a rival on the basis of a breach of the racing rules. A protest committee will hear both sides, and if the protest is upheld, the offending yacht may be penalized.