A charge made for lifting articles too heavy to be lifted by a ship's normal tackle.

A wedge-shaped piece of timber used to secure barrels against movement.

A small local current usually caused by tidal streams as they ebb and flow around or against obstructions.

A penalty charge against shippers or consignees for delaying the carrier's equipment beyond the allowed free time. The free time and demurrage charges are set forth in the charter party or freight tariff.- See also Detention and Per Diem.

Cargo discharged in excess of the quantity on the manifest.

To store a yacht away on land for the winter

A keel that is narrow and deeper than a full keel.

The top point of the line about which the earth rotates.

The fitting which connects the boom to the mast.

A manmade waterway used to connect bodies of water that do not connect naturally. Canals use locks to raise and lower boats when connecting bodies of water that have different water levels.

A cleat designed to hold a line in place without slipping. It consists of two narrowing jaws with teeth in which the line is placed.

A large foresail which extends aft behind the mast.

An order to cease (stop).

The permitted increase in pressure developed after the valve has opened. Usually expressed in percentage, ie.; 3% accumulation (A.S.M.E. Code, Section I). Flows through safety/relief valves are officially determined at these overpressure conditions.

Most ocean freight is billed on the basis of weight or measurement tons (W/M). Weight tons can be expressed in short tons of 2000 pounds, long tons of 2240 pounds or metric tons of 1000 kilos (2204.62 pounds). Measurement tons are usually expressed as car ...

The condition when a perfect gas is isentropically compressed, and the gas inlet temperature and also the amount of work spent is the same for each stage.

To keep a weather eye is to be on the alert (heads up).

After or trailing edge of a sail; the after edge of a fore-and-aft sail and the outer edges of a square sail.

A wind shift that allows a boat to sail above its mean wind course.

The length of the boat at the waterline.