A projecting aperture at the end of a tube, pipe etc. serving as an outlet for compressed air. Reduces the demand on the compressor by generating the highest thrust and volume for the lowest possible air consumption.

The compression of an air actuator (air spring) below its design height.

The Captain of a vessel. Highest officer aboard ship. Oversees all ship operations. Keeps ships records. Handles accounting and bookkeeping. Takes command of vessel in inclement weather and in crowded or narrow waters. Handles communications.

Bulk Carrier or Motorcar Carrier

Search of a vessel, by Customs authorities, for unreported goods.

A bulkhead that will not let water pass from one side of it to the other.

A fabric bag through which a gas stream is passed for the removal of particulate matter.

Those frames of a ship's hull which are equal in area, one forward and one aft of the ship's center of gravity.

A container frame fitted to accommodate two or more separate tanks for liquids.

The increase in pressure in the discharge header that develops as a result of flow after the pressure relief device opens

A ton on which the shipment is freighted. If cargo is rated as weight or measure (W/M), whichever produces the highest revenue will be considered the revenue ton. Weights are based on metric tons and measures are based on cubic meters. RT=1 MT or 1 CBM.

A large foresail or jib that overlaps the mainsail. Also known as a genny. Can be expressed in percentages of overlap, e.g. 150 Genoa is 50% overlap of the mainsail.

Incapable of being mixed without separation phases. Water and petroleum oil are immiscible under most conditions, although they can be made miscible with the addition of an emulsifier.

Combination minimum pressure valve and check valve.

The toal temperature at the intake flange of the compressor.

The white froth on the crests of waves.

Circular iron band used to hold a bowsprit on the stem of a sailing vessel.

The highest continuous deck which runs the full length of the ship without a fall or interruption.

A life-threatening condition where there is loss of body heat; the greatest danger for anyone in the water. As the body loses its heat, body functions slow down, and this can quickly lead to death.

The operation of taking a sounding with the hand lead (to find bottom).