A crack or hole that accidentally admits a gas or lets it escape.

A light showing an unbroken light over an arc of the horizon of 360 degrees. An anchor or riding light is an all-round light.

A reef in a spanker or fore-and-aft mainsail, which runs from the outer head-earing, diagonally, to the tack. It is the closest reef, and makes the sail triangular, or nearly so.

An electrical current that periodically reverses its direction. Standard in US and Canada is 60 cycles per second. Europe and other countries is 50 cycles per second.

Standard pressure and temperature. See standard air.

A line secured along the deck to lay hold of in heavy weather; a line thrown on board a wreck by life-saving crew; a knotted line secured to the span between life-boat davits for the use of the crew when hoisting and lowering

A movable block and tackle used on board for a variety of purposes, including the handling of cargo in holds.

An electronic communications or direction finding system which uses Very High Frequency radio waves. VHF radios are the most common communications radio carried on boats, but their range is usually limited to line of sight between the transmitting and rec ...

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

The compass points of North, East, South and West. Intercardinal or half-cardinal points are Southeast, Southwest, Northwest and Northeast

Said of a line that leads from its point of attachment towards the stern of the ship.

Welded Minimum Wall tubing

On square-rigged ships, a form of ceremonial salute to honor the visit of a high official. The yards were lined by men standing upon them, and there was also a man standing on the truck of each topgallant mast.

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

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.

Also known as a steaming light. The masthead light is a white light that is visible for an arc extending across the forward 225

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

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

In navigation, the angle between the point at which the sun rises and sets and the true east and west points of the horizon.

(Compressors/Gas Turbines) Is an alarm system that has maybe 3 sensors connected to it and it will require minimum of 2 of the 3 to alarm before the alarm will act. There is a controller connected that does the logic decision based on set parameters.