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.

On a square-rigged ship, a tackle used for hoisting casks and provisions.

The cover of a scuttle-way or small hatchway which leads to to or from a store room, cabin of small craft, crew's quarters, the forecastle or fore peak.

A frame used to support the boom when the sail is down.

Is the ratio of weight of vapor existing in a given space to the weight that would be present if the space were saturated at the space temperature.

The after section of the propeller shaft.

Ability of a filter to remove particle matter from an air stream. Measured by comparing concentrate of material upstream and downstream of the filter. Typical particulate sizes range from .3 micron to 50 micron.

The difference between magnetic north and true north, measured as an angle. Magnetic variation is different in different geographic locations, so the nearest compass rose to each location on a chart must be used.

Is the temperature at the inlet flange of the compressor.

A rail surrounding the poop deck.

Area into which a boat can not go without tacking.

A passenger or cargo-carrying ship which is operated between scheduled, advertised ports of loading and discharge on a regular basis.

A curved inlet section on an impeller.

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

Ship's boat kept ready for immediate lowering while at sea. When used for life-saving, it was called an "accident boat" or lifeboat.

Isolated rocky peak rising from a sheet of inland ice.

An object bears so and so, when it is in such a direction from the person looking. To bear down upon a vessel, is to approach her from the windward.To bear up, is to put the helm up and keep a vessel off from her course, and move her to leeward.To bear aw ...

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.

Standard cubic feet per minute., SCFM or scfm. Flow of free air measured at some reference point and converted to a standard set of reference conditions (e.g., 14.4 psia, 80

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.