(1) Sailing away from the wind with the sails let out all the way; going with the wind, downwind sailing (2) To allow a line to feed freely. (3) The shape of the afterpart of the underbody of a ship in relation to the resistance it creates going through t ...

LPG or propane for short. Propane is a common fuel used for cooking and heating. CNG natural gas is considered safer because propane is heavy than air and will sink into the bilge if it leaks, creating the potential for an explosion. Propane is more easil ...

A valve that controls the flow of air that passes through the valve. Used often for retardation or timing circuits, but especially for regulating the piston speed in cylinders.

A measurement applied to filters or filter media to indicate the particle size at which suspended solids above that size will be removed.

ACRONYM - Approach temperature. Usually the difference between cooling water temperature in to compressed air temperature out of an inter-cooler or after-cooler. Sometimes used to define oil cooler efficiency (cooling water temperature in to oil temperatu ...

Jail

A spring loaded pressure relief valve actuated by the static pressure upstream of the valve. The valve opens normally in proportion to the pressure increase over the opening pressure.

The normal working pressure for an air motor (6 bar).

An air operated device for hoisting or pulling. Similar to a slusher or winch

A type of knot used to fasten an anchor to its line.

The helmsman.

The document containing all particulars relating to the terms of agreement between the Master of the vessel and the crew. Sometimes called ship's articles, shipping articles.

Transverse or longitudinal partitions separating portions of the ship ("walls" in a ship).

To assist or help.

1.06 liquid U.S. quarts or 33.9 fluid ounces.

A transportation line that hauls export or import traffic between ports and inland points.

The anchor is under the hawse .

An extra or additional charge.

A bulkhead, frame, or longitudinal stiffener, running fore and aft.

The U.S. federal body charged with enforcing acts of the U.S. Congress that affect common carriers in interstate commerce. STB replaced the Interstate Commerce Commission (ICC) in 1997.