A rotating device, with two or more blades, that acts as a screw in propelling a vessel. Sometimes called a screw.

Movement of crest of a progressive wave. Can also refer to radio waves.

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.

A signal which is hoisted during a sailing race to protest the actions of another (for rules infractions)

The bow and forward part of the vessel above the waterline.

The part of the bow above the water.

Is the saturation pressure at the critical temperature. It is the highest vapor pressure that the liquid can exert.

Pounds per square inch, absolute.

Pounds per square inch, differential.

Pounds per square inch, gauge. Pressure indicated by a pressure gauge.

Carries supplies to drilling units or installations during field de-velopment or production.

Has to do with the properties of air-water vapor mixtures in the atmosphere.

Polytetrafluorethylene.

A name usually given to a State body having control or regulation of public utilities.

Person authorized by transportation lines to publish tariffs or rates, rules, and regulations for their account.

A sudden burst of wind stronger than the current wind conditions.

Procedure where carrier tests the temperature of the internal flesh of refrigerated commodities to assure that the temperature at time of shipment conforms to prescribed temperature ranges.

An elevated guardrail set up at the bow of a vessel. When erected at the stern, it is called a pushpit.

A small receiver fitted on the inlet or discharge of a reciprocating compressor. The device is designed to remove the resonance from the compressor thereby reducing noise.

Is the reversal of flow within a dynamic compressor that takes place when the capacity being handled is reduced to a point where insufficient pressure is being generated to maintain flow. Also known as surge.