A rail surrounding the poop deck.

A line with a weight on the end used to measure depth. The lead is dropped into the water and marks on the line are read to determine the current water depth. The lead usually has a cavity to return a sample of the bottom type mud, sand, etc.

A compressor designed to compress air or gas without contaminating the flow with lubricating oil. Piston rings and packing are usually made of TFE-based materials or carbon or other synthetic material that operate without lubrication.

Isolated rocky peak rising from a sheet of inland ice.

A stopper used to prevent water from entering the hawse hole in heavy weather.

Said of a vessel when caught between ice on both sides.

A pressure-volume diagram for a compressor or engine cylinder produced by direct measurement made by the use of a device called an indicator.

A form of wear in which seizing or tearing of the gear or bearing surface occurs.

A fluid (as hydrogen or air) that tends to expand indefinitely. Is one of three basic phases of matter.

A framing of metal fitted over an opening in a deck, with glass or plexiglass inserted for the admission of light into a cabin, engine room, etc.

Unit of free air flow rate. Normal cubic meter per hour. The air in the following conditions:1.013 bar(a) of pressure; 0 degrees Celsius of temperature and 0% of relative humidity .

The physical or mechanical process of separating insoluble particulate matter from a fluid, such as air or liquid, by passing the fluid through a filter medium that will not allow the particulate to pass through it.

See Insurance, Particular Average.

The area (in sq inches) of the filter element that is exposed to the flow of air or fluid for effective filtering.

A labyrinth type filter having the active surfaces continuously splashed with oil. Most pollutants are absorbed by the oil which when circulated releases its pollutants, which sink by gravity to the bottom of the oil pan.

Get gear in condition for use; to separate the blocks of a tackle to lengthen the fall (ready for use again).

Slang for anchor

The dimensions of all parts which go into the construction of a ship's hull.