Another name for the bo'sun's whistle.

The power which is theoretically required to compress a gas under constant entropy from a given inlet pressure to a given discharge pressure. (calculated assuming ideal conditions).

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.

Abbreviation for "Subject to Particular Average." See also Particular Average.

A non-negotiable bill of lading which states a specific identity to whom the goods should be delivered. See Bill of Lading.

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

Steady regular winds in a belt approximately 30

Slang sailing expression for a piece of metal or shroud that can cut or stab you.

A certificate issued by an independent agent or firm attesting to the quality and/or quantity of the merchandise being shipped. Such a certificate is usually required in a letter of credit for commodity shipments.

An itemized list of goods shipped to a buyer, stating quantities, prices, shipping charges, etc.

A cruise of a new ship for the purpose of testing out all machinery, etc. Shank

The general preparation of a vessel to make ready for the sea in all respects.

To steer the boat more into the wind, thereby causing the sails to flap or luff.

A liquid piston compressor is a rotary compressor in which a vaned rotor revolves in an elliptical casing, with the rotor spaces sealed by a ring of liquid rotating with it inside the casing.

Swing of the boom from one side of the ship to the other when the tack is changed.

A spar which projects forward from the bow of some boats, and extends the sail plan by allowing the headsails to be secured further forward.

Two or more bearings are noted on the chart in order to determine the ship's position at the intersection of the two

Nautical Flag meanings can be found here.

Occurs whenever the system undergoes either a change in state or an energy transfer at a steady stare.

A bulkhead placed athwartships.