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 position based on estimations of a boat's position using estimated speed, currents, and the last known position/fix - of the boat.

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.

Jail

The process of assimilating many small shipments into one large shipment at a central point so that economies of scale may be achieved; to commence discharge of cargo.

A shipwrecked sailor as compared with one who has been marooned or deliberately put ashore.

To assist or help.

Is one in which there is no liquid injection and/or liquid circulation for evaporative cooling or sealing.

A region near the earth in which the relative velocity increases from zero with elevation, due to the motion of the atmosphere relative to the earth's surface.

A method of storing a sail, e.g., by rolling the jib around the headstay.

The bow and forward part of the vessel above the waterline.

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 ...

(1) To tip the boat over so that the boat is upside down with the mast pointing down to the sea bottom. (2) A bag in which a spinnaker or other large sail can be stowed with the lines attached so that it can be rapidly raised.

In water transportation, the time it takes between the arrival of a vessel and its departure.

Liquefied Petroleum Gas, or a carrier of LPG.

A line connecting points of equal magnetic variation on a map.

See insurance.

Slang expression to indicate that a ship was not fitted with any mechanical aids, and that all the work of the ship had to be done with the strong arms of the crew.

A design in which the forestay does not go to the very top of the mast, but instead to a point 3/4-7/8 of the way up the mast.

The tall, narrow, waterproof box that houses a vessel's centerboard and allows it to be retracted into the ship's hull.