Devices used between rotating and stationary parts to separate, and minimized leakage between, areas of unequal pressures.

In charge of twelve to four watch. Ships navigation officer. Keeps charts (maps) up to date and monitors navigation equipment on bridge.

Self Contained underwater Breathing Apparatus - see Aqualung.

A system by which an object such as a compass is suspended so that it remains horizontal as the boat heels.

Name given to the metal point or ram fixed on the bows of old war galleys and used to pierce the hulls, and thus sink or disable enemy ships.

A notation on a bill of lading that the cargo has been stowed on the open deck of the ship.

A portion of the discharge gas is redirected through a heat exchanger and then expanded back to suction pressure, where it is mixed with normal suction gas stream and commonly used to compensate for process flow demands.

A semi great circle joining the north and south poles. Known as lines of longitude, they cross the equator and all parallels of latitude at right angles.

The time allotted to a man to stand at the helm.

Loaded with more cargo than a ship can safely navigate with. Drunk.

Turning the wheel or tiller as far as possible

The strongest part of a vessel's side, to which the beams, knees, and foot-hooks are bolted. The part between the water's edge and the bulwarks.

A measurement of vacuum or pressure that is used to measure the airflow restriction.

Any object that a navigator may use to find his position, such as permanent land or sea markers, buoys, radiobeacons, and lighthouses.

Inlet and outlet connections are located at the same level on opposite sides of the filter or other device installed on the pipeline.

A means of hauling up or lowering a cylindrical object.

Old three-masted trading vessel which was square-rigged on the fore and main masts, and lateen rigged on the mizzen mast. Similar to the Caravel, but larger and more robust.

To make headway when there is no apparent wind.

The maximum continuous operating pressure as designed by the manufacturer.

Are categorized as internal or external heat reactivated. Internal type - Process air enters the dryer through the inlet piping, is then dried as it passes through the desiccant bed, and discharges through the outlet piping as dry air. Regeneration of the ...