Ratio of the pressure of a gas to its critical pressure, in like units.

Is a unit of work equal to 33,000 foot pounds per minute, 550 foot pounds per second, or 746 Watts.

Across the width of a boat. Also Athwartships.

A sailor's carving or etching on bones, teeth, tusks or shells.

(1) When two or more boats tie up alongside each other. (2) Overlapping of edges of two ice-floes, so that one floe is partly supported by the other.

To put a narrow piece of canvas around it after it has been wormed, and before it has been served.

The extreme deck fore and aft measurement of a vessel.

A joint Bureau of the Census' International Trade Administration form used for compiling U.S. exports. It is completed by a shipper and shows the value, weight, destination, etc., of export shipments as well as Schedule B commodity code.

Beneath the deck

A logistical management system which integrates the sequence of activities from delivery of raw materials to the manufacturer through to delivery of the finished product to the customer into measurable components. "Just in Time" is a typical value-added e ...

Sailor's term for soot or ashes which sometimes fell into food while it was being cooked.

A book containing the official record of a ship's activities together with remarks concerning the state of the weather, etc.

The leaning of a boat to the side because of excess weight on that side; inclination of a boat due to excess weight on one side or the other.

The ratio of clearance volume to the volume swept by the compressing element.

Also bosun, bos'n, bo's'n, and bo'sun, all of which are pronounced bosun. The highest unlicensed rating in the deck department who has immediate charge of all deck hands, oversees deck crew, maintenance and upkeep of the ship except for the engine room an ...

A motor controller that regulates the air flow through an end plate into the motor to control the speed and power. A speed regulation device built into or attached externally.

Vessel said to be "on her beam ends" when she is lying over so much that her deck beams are nearly vertical.

Filter, Regulator and lubricator sometimes combined in one unit

Invisible waves in the electromagnetic spectrum that are used to communicate (radio) - and navigate (radar).

On the land or aground.