A certificate authenticated by a recognized port authority, certifying that a ship comes from a place where there is no contagious disease, and that none of her crew was infected with such a disease.

A rail car without a roof and walls.

When reciprocating compressors run, the moving parts such as pistons, rods, crossheads, connecting rods are repeatedly accelerated and retarded. These velocity changes set up pulsating inertia forces. The forces are of the first and second order. The firs ...

A unit of pressure used with vacuum pumps, equal to 1mm of mercury and 133.32 Pascal's.

Light, warm wind on surface of sea.

Port where cargo is discharged from means of transport.

A liquid piston compressor is a rotary compressor in which a vaned rotor revolves in an elliptical casing, with the rotor spaces sealed by a ring of liquid rotating with it inside the casing.

This property is the ratio of the specific weight of air or gas to that of dry air at the same pressure and temperature.

Where the engines of a ship are confined.

A strong vertical post used to attach lines for towing or mooring.

Type of wrench used to tighten or loosen fire hose fittings.

A sailing vessel dead in the water due to lack of wind (not moving).

An astray shipment (a lost shipment that is found) sent to its proper destination without additional charge.

The lower yard on a mizzen mast of a square-rigged ship.

Abbreviation for "Gross Vehicle Weight." The combined total weight of a vehicle and its container, inclusive of prime mover.

A quality of compressed air for use with pneumatic instruments and controls. (usually dry and free from contaminants)

A platform and protective coaming setting high up on a mast, to accommodate the look-out aloft while the ship is at sea.

Leaning out over the side of the boat to to counteract heel and balance it.

Any steel bar or column, fitted vertically, to support a deck, or any part of a ship's structure. Also called a stanchion.