The after section of the propeller shaft.

Covers for closing up hatchways.

Atmosphere

The amount by which magnetic variation changes up or down each year in a particular area. The annual increase or decrease is printed in the compass roses on each chart and may make a significant difference over a number of years.

The porous device which perform the actual process of filtration.

An analytical method of assessing machine health by quantifying and examining ferrous wear particles suspended in the lubricant or hydraulic fluid.

Foaming water that rises upward immediately before stem of any craft being propelled through water.

See Gunwhale

Shore crane with a wide span.

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

A party responsible for the payment as evidenced by the given instrument. Under letters of credit, the payer is the party on whom the draft is drawn, usually the drawee bank.

The surface of the water.

Line led forward, from quarter of a vessel, to prevent her from moving astern.

A short length of line, usually braided or marled, used to temporarily bind the anchor cable to the messenger when the anchor is weighed by hand around the capstan.

A portable generator which can be attached to a refrigerated container to power the refrigeration unit during transit.

An angle piece fitted over the edge of boxes, crates, bundles and other packages to prevent the pressure from metal bands or other types from cutting into the package.

ACRONYM - National Pipe Thread tapered. A description of a specific pipe thread

Also known as LTL or LCL.

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.