A term indicating a temperature relationship between two temperatures or temperature variation between two points.

When compressed air is forced through a submerged perforated hose or pipe. Some applications include; ice prevention, reduction of salt intrusion, underwater basting, pneumatic breakwaters and general mixing and agitation

Away from land, toward the water.

Slang name for the Q Flag. Also an old term for yellow fever.

An opening in a ship's deck for the loading and discharging of any kind of cargo.

The distance between a rope's adjacent strands, giving a measure of the tightness of the lay. The shorter the distance, the harder the lay. When a line has been overused and the lay has become slack, it is said to be slack-jawed.

Is the pressure exerted by a vapor confined within a given space. The vapor may be the sole occupant of the space, or may be associated with other gases.

Thread - Unified national coarse.

A place suitable for anchoring in relation to the wind, seas and bottom.

A strong tropical counterclockwise revolving storm the southern hemisphere. In the northern hemisphere these storms revolve clockwise and are known as hurricanes.

A pump which is used to deliver air to the aquarium. The pump pushes air through silicon tubing and to air stones or other aquatic decor. They are also an essential for UGF's (undergravel filters). An air stone is placed in each clear tube. When the air b ...

A yard or pole extending the head or foot of the topsail beyond the topmast or gaff of a gaff-rigged boat

The distance between the water level at chart datum and an overhead obstacle such as a bridge or power line.

An international goods classification system for describing cargo in international trade under a single commodity-coding scheme. Developed under the auspices of the Customs Cooperations Council (CCC), an international Customs organization in Brussels, thi ...

The motion of air relative to a body in it.

Holes cut in a plate to make it lighter and yet not reduce its strength.

A movement of equipment from an origin rail ramp to a destination rail ramp only.

An enterprise in which there is a risk of loss.

A projecting aperture at the end of a tube, pipe etc. serving as an outlet for compressed air. Reduces the demand on the compressor by generating the highest thrust and volume for the lowest possible air consumption.

A sea which is traveling in the opposite direction to that of the boat