Space between the floor of holds and the bottom of the ship.

A hand hold. Usually along the cabin top or ladder.

Condensation which occurs when a ship sails from a cool to a relatively warm climate.

A pear-shaped, grooved metal fitting around which an eye splice is made

Insufficient number of crew; shorthanded.

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

A method of preventing the ends of a line from unlaying or fraying by turns of small stuff, stout twine or seizing wire with the ends tucked.

The direct sailing line in which a racing mark or buoy can be fetched while sailing the desired course

Away from land, toward the water.

Standard pressure and temperature. See standard air.

A line used to hoist or lower a sail, flag or spar. The tightness of the halyard can affect sail shape.

A compressor belonging to the group of dynamic compressors. Characterized by having its flow in the axial direction.

A thermal expansion valve.

The ship's water closet (toilet or wash-room). The upper edge of a quadrilateral sail.

The line by which a boat is connected to a mooring buoy; a short rope hanging from a spar having at its free end a spliced thimble or a block. Sometimes called "Pennant".

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.

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

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

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