A lubricating oil made with synthetic base stocks.

A wooden bar which may be shipped in the capstan head for heaving around by hand (to heave up anchor or heavy objects by manpower).

International Labor Organization; Based in Geneva, it is one of the oldest components of the UN system of specialized agencies and has been involved over the years in appraising and seeking to improve and regulate conditions for seafarers. In its unusual ...

The degree to which all the forces on a boat are symmetrical so the vessel sails with just a slight weather helm.

The person who is in charge of a vessel and legally responsible for it and its occupants.

An industry abbreviation for "Hazardous Material."

Wind that is deflected from it's normal course by the sails

Sling of various types used for lifting vehicles on to and off general cargo ship.s

To stand at the mast and pull down on a halyard as another crewmate winches it in.

(1) A wind shift further forward relative to the boats direction or heading. (2) A bar or angle under a deck the same size as deck beams. It is used around stair openings in deck, small hatch openings, or at dead end of longitudinals.

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 ...

Pressure dew point temperature (

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

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

See Intracoastal Waterway.

A metal air-tight tank built into a boat to insure flotation even when the boat is swamped.

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 suction pressure attained by an ejector or positive displacement vacuum pump at zero capacity with the suction absolutely blanked off.

(1) To throw, as to heave a line ashore. (2) An upward pull on a line; to lift (3) The rise and fall of a vessel in a seaway.

Is the ratio of the computed isentropic temperature rise to the measured total temperature rise during compression.