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.

The tide with the least variation in water level, occurring when the moon is one quarter and three quarters full. The lowest high tide and the highest low tide occur at neap tide. The opposite is the spring tide.

Nautical equivalent of ceiling

A restrictive tube used in a refrigeration system which restricts the flow of freon and allows pressure to build on one side and suction on the other. It is located between the condenser and the evaporator.

A single block such as a snatch block used as a fairlead to bring a line in a more favorable direction.

Is the ratio of the thermodynamic work requirement in the cylinder to actual brake horsepower requirement.

An order to stop; as, "Avast heaving!"

Difference in air or gas temperature between the outlet of the intercooler and the inlet of the compressor.

Wind coming from the north.

The line to which a vessel is submerged with a full cargo on board.

A phrase preceding the signature of a drawer or endorser of a negotiable instrument; signifies that the instrument is passed onto subsequent holders without any liability to the endorser in the event of nonpayment or nondelivery.

Is the energy a substance possesses by virtue of its motion or velocity. Used primarily in calculations for dynamic and ejector type compressors

A knot used to tie two lines together.

A rail around the mast or on the bulwarks with holes for belaying pins to which lines or halyards are attached.

A method of drying natural gas.

The official who is in charge of a harbor, enforcing all its applicable regulations.

A board with cleats, forming a bridge reaching from a gangway of a vessel to the wharf.

U.S. Commerce Department document, "Shipper's Export Declaration."

To fill the seams of a vessel with pitch.

Person given a passage in one of H.M. ships; usually on compassionate grounds.