In sailboat racing, to disturb the wind of a windward boat by positioning your boat a bit ahead and to leeward. If done correctly, the disturbed air hitting the windward boat will slow it down, leaving it at a distinct disadvantage and causing it to tack ...

Sailing vessel with three or more masts. Square rigged on foremast, fore and aft rigged on all others.

Six feet. Comes from the Dutch word "fadom" which was the distance between fingertips of outstretched hands.A unit of measurement relating to the depth of water or to the length of line or cable; one fathom is 6 feet or 1.83 meters

To continue sailing under the same canvas despite the worsening of the wind.

The swiveled opening at the top of a ventilator.

The highest level of cube utilization that can be achieved when loading cargo into a container.

A windlass or capstan drum.

Incapable of being mixed without separation phases. Water and petroleum oil are immiscible under most conditions, although they can be made miscible with the addition of an emulsifier.

Sort of large pulley with sheave and steel block found on a derrick

Letters, numbers, and other symbols placed on cargo packages to facilitate identification. Also known as marks.

A manmade waterway used to connect bodies of water that do not connect naturally. Canals use locks to raise and lower boats when connecting bodies of water that have different water levels.

Angled frames in the extreme forward or aft ends of a ship which form the sharp ends of the vessel's hull.

The medium or material that does the actual filtering or separating. May be paper, wire mesh, special cellulose, inorganic plastic, or a combination.

Compressors of 20 HP or less, generally combined with all the components required to put the into operation.

The action of letting go the sheets of a sailing vessel, thus spilling the wind and reducing the forward motion of the boat.

Abbreviation for "Not Otherwise Indexed By Name."

The energy in foot pounds required to compress adiabatically and to deliver one pound of a given gas from one pressure level to another.

Cotton yarn used for cleaning purposes.

The opening up the back (aft) edge of the mast in which the mainsail luff rope slides when it is hoisted. Some masts have an external sail track.

Said of anchor when it is under ship's forefoot, and cable is nearly up and down.