Compressors in which successive volumes of air or gas are confined within a closed space, and compressed. They may be either reciprocating or rotating. (Trap air and then squeeze it to the desired pressure).

Specific Power Consumption.

Elevated structure from which coal and other cargoes can be loaded into a vessel. Name is also given to a landing-place, or loading-place.

A machine that compresses air, gases.

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

(1) A spar that extends from the bow of the boat. (2) A spar stretching diagonally across a four-sided fore-and-aft sail to support the peak.

A small toggle used on a flag.

A warehouse authorized by Customs authorities for storage of goods on which payment of duties is deferred until the goods are removed.

A fitting of wood or metal, with horns, used for securing lines (tying up).

The bank that adds its confirmation to another bank's (the issuing bank's) letter of credit and promises to pay the beneficiary upon presentation of documents specified in the letter of credit.

the weight of a specified artificial contaminant that must be added to the influent to produce a given differential pressure across a filter at specified conditions. Used as an indication of relative service life.

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

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.

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

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.

On a bellow type air actuator, that part of the flexible member forming an annular protrusion larger than the O.D. of the end retainers or bead rings.

A hawser or line attached to an anchor.

(1) A point of sail between close-hauled and a run, with the wind coming from abeam. (2) A distance, or fetch. (3) Straight stretch of water between two bends in a river or channel.

Ship's intercom system