Is the weight of a given volume of gas, usually expressed in lb / cu ft at SPT condition.

Meddling or fooling around.

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

Sailing upwind so close to the wind that the forward edge of the sail is stalling or luffing, reducing the power generated by the sail and the angle of heel. Also known as pinching.

The recognized abbreviation for the International Chamber of Commerce Terms of Sale. These terms were last amended, effective July 1, 1990.

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

A large sail that is a cross between a spinnaker and a genoa. Hoisted without a pole, the tack is attached at the bottom of the headstay.

A light sail, such as a spinnaker, used to make the most of light following winds.

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.

A compressor belonging to the group of displacement reciprocating compressors.

A pointed stern, such as those on a canoe.

Opposite of absorption or adsorption. In filtration, it relates to the downstream release of particles previously retained by the filter.

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

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

A heavy colorless gas that does not support combustion but is formed by the combustion and decomposition of organic substances. Found in some ambient air conditions.

The positioning and shape of the sails to the wind; To sheet in or out the sails for the most optimal performance and speed

The vertical absorption of a liquid into a porous material by capillary forces.

Is singular for media and is the material...paper, wire, cellulose or a combination... from which the filter element is made and which does the actual filtration or separation.

A small vessel fitted for towing.

Completely filled with water.