The relationship of flow per unit area to differential pressure across a filter medium.

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 navigational aid with a light that flashes about once per second.

Machines in which air or gas is compressed by the mechanical action of rotating vanes or impellers imparting velocity and pressure to the flowing medium. (Raise the pressure of the air by converting the energy from the velocity of the air to pressure.)

Narrow triangular sail set on a long yard or spar, the forward end of which is hauled down so that it sets obliquely on the mast with a high peak.

A thousand.

To haul in.

Thin strips of wood put around the hatches, to keep the tarpaulin down. Also put upon rigging to keep it from chafing. A large batten widened at the end, and put upon rigging, is called a scotchman.

A cap for the top of the mast.

A compartment having a watertight bulkhead at each end.

A mallet used for passing serving around a line.

In general, a person employed in a sea-going vessel. In some cases, applied to a seaman who works on deck.

Goods floating on surface of sea after a wreck.

Machines cooled by water circulated through jackets surrounding the cylinders or casings.

A lower-than-usual tariff rate assessed because a shipper offers a greater volume than specified in the tariff. The incentive rate is assessed for that portion exceeding the normal volume.

Seaman's term for the period of work on board ship for which he has been paid in advance when signing on.

A train of a specified number of railcars, perhaps 100, which remain as a unit for a designated destination or until a change in routing is made.

Direction from which the wind is blowing; an unsailable sector between close hauled headings.

A float with a flag at the top of a pole. Used to mark a position such as for a mooring, a race or a man overboard.

The sovereign power to take property for a necessary public use, with reasonable compensation.