is the energy a substance possesses because of its elevation above the earth (or above some other chosen datum plane). .

A pair of vertical wooden or iron heads on board ship, used for securing mooring or towing lines. Similar to dock bollards.

In a wheel, such as a steering wheel, a spoke is a rod that extends from the hub outwards to the rim.

A flag signaling that a ship is about to sail and that all should report on board. It is International Code Flag "P".

A compressor that is designed to operate at lower pressures. Usually a blower is an air compressor that operates below 2 barg, although this figure depends upon the respective manufacturer.

A measure of air compressor efficiency, usually in the form of bhp/100 acfm or acfm/bhp

Convention on International Regulations for Preventing Collisions at Sea; Rules of the Road. Internationally accepted rules by which vessels at sea must keep clear of each other.

Fast boat used for passenger and cargo traffic in fairly sheltered waters.

An amount added or deducted from base rate to make a rate to or from some other point or via another route.

A program whereby the U.S. government attempted to offset the higher shipbuilding cost in the U.S. by paying up to 50% of the difference between cost of U.S. and nonU.S. construction. The difference went to the U.S. shipyard. It is unfunded since 1982.

A bank that, in its own country, handles the business of a foreign bank.

A large and powerful sheet winch

Decorative ropework with an even number of strands to form a herring-bone pattern.

Small line consisting of several loosely twisted yarns.

A device for issuing fog signals, used for giving a warning of a vessel's presence in fog. These signals are also made by lighthouses.

The action of a whale when it comes to the surface and expels the seawater it has taken in while feeding. The traditional hail of the lookout in a whaling ship when sighting this spouting water is "There she blows".

A sharp-bowed sailing vessel of the mid-19th century, having tall masts and sharp lines; built for great speed; the generic name used to describe types of fast sailing ships.

Freight moving under a bond to U.S. Customs or to the Internal Revenue Service, and to be delivered only under stated conditions.

Any person not a common carrier who, under special and individual contracts or agreements, transports passengers or property for compensation.

A small toggle used on a flag.