A mat of fibers that provide a barrier to particles entrained in the flow of air or gas.

The line where the water comes to on the hull of a boat. Design waterline is where the waterline was designed to be, load waterline is the waterline when the boat is loaded, and the painted waterline is where the waterline was painted. Actual waterline is ...

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

Is the pressure existing at a given temperature in a closed vessel containing a liquid and the vapor from that liquid after equilibrium conditions have been reached. It is dependent only on temperature and must be determined experimentally.

Standard pressure and temperature. See standard air.

Reciprocating type compressor used mainly in oil and gas field applications. The compressor cylinders operate at low compression ratios and experience small temperature rise.

A spring line from the stern of a boat to mid ships to stop forward movement

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

On the lee side of an object, protected from the wind.

A mythical creature, half human and half fish.

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.

For gauging purposes a transverse section including all longitudinal members such as plating, longitudinals and girders at the deck, side, bottom, inner bottom and longitudinal buklheads.

Shifting the moving block of a tackle from one place of attachment to another place farther along to give more advantage.

Standing or running (adjustable) wire rigging that supports the mast from the stern; a wire mast support leading aft to the deck or another mast

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

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

To come alongside.

Navy term meaning Officer of the deck.

The carbon left after evaporating an oil under controlled conditions.

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.