A worn out vessel.

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

A device invented by Captain Jacques Cousteau in 1943 to enable a diver to operate underwater independent from an air supply from the surface.

Heavy weight,which gives a ship stability when the vessel is not carrying cargo.

A line that controls the angle of the sail in its relation to the wind; attached to the clew of a sail to adjust its trim (make the sail the proper shape to catch the wind).

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

The way a boats spars and sails are arranged. To rig a vessel is to fit her with masts, spars, sails and running and standing rigging; term is also used to mean the setting up a device, e.g., to rig a lifeline, a tackle, etc

A multihulled boat with three hulls.

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 ...

The region around the equator between the Tropic of Cancer and the Tropic of Capricorn. The tropics are known for their warm weather.

A person or firm who transacts all business in a port on behalf of shipowners or charterers. Also called shipping agent; agent.

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.

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

The post that the rudder is attached to. The wheel or tiller is connected to the rudder post.

The horsepower required to compress adiabatically the air or gas delivered by the compressor through the specified range of pressures.

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

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

A short period at the turn of the tide. The time between flood and ebb tides when there is no current flow.

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 navigational buoy on which is mounted a bell with clappers hung inside a metal cage, which is rung by the motion of the sea. It serves as a warning of shoal waters.