A free port in a country divorced from Customs authority but under government control. Merchandise, except that which is prohibited, may be stored in the zone without being subject to import duty regulations.

A marine hardware store.

Port of initial Customs entry of a vessel to any country. Also known as First Port of Call.

A wooden wedge fitting into a drainage hole in the bottom of a boat for the purpose of draining the boat when she is out of water.

A sudden squall of wind accompanied by lightning.

The triangle formed by the masthead, the base of the mast at deck level, and the lower end of the headstay.

Is a compression in which the temperature of a gas remains constant.

An old naval saying to indicate those young men who, through birth or connection, were able to enter the Royal Navy without examination. Their subsequent promotion was assured.

Sails that lie in the direction of the ship's length and whose luffs abut the masts or are attached to stays.

Froth of sea foam.

A written contract between the owner of a vessel and the person desiring to employ the vessel (charterer); sets forth the terms of the arrangement such as duration of agreement, freight rate and ports involved in the trip.

A stationary element between stages of a multistage centrifugal compressor. It may include guide vanes for directing the flowing medium to the impeller of the succeeding stage. in conjunction with an adjacent diaphragm, it forms the diffuser surrounding t ...

The point (speed of sound) at which air flow through an orifice can not increase regardless of pressure drop.

A volume. Cubic meters per second.

The pressure that would be produced by stopping a moving stream of liquid or gas.

Shanties are the work songs that were used on the square-rigged ships of the Age of Sail. Their rhythms coordinated the efforts of many sailors hauling on lines.

The quantity of heat required to raise the temperature of a unit weight of a substance by one degree.

(1) The flag traditionally flown by pirate ships. (2) The name given by sailors to the bubonic plague, whose victims were said to turn black.

A boat with a flat bottom and square ends.

A type of journal bearing in centrifugal air compressors.