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

A fix taken by visually observing the location of known landmarks.

Uncharted navigational danger that has been reported but has not been verified by survey.

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

Slang for getting married. A splice joins two lines together permanently.

Direct current. A continuous, one directional flow of electricity

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

CFM flowing through the compressor inlet filter or inlet valve under rated conditions

A wind shift that forces a boat to sail below its mean wind course.

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.

An absolute temperature scale. (

(1) Said of ship's head when it moves away from wind, especially when tacking. (2) To discharge a crew and close Articles of Agreement of a merchant ship.

An abbreviation of forecastle.

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

The part of a rotating element that counteracts any inherent thrust developed by the impellers.

The air compressor continues to run, usually at full RPM, but no air is delivered because the inlet is either closed off or modified, not allowing inlet air to be trapped.

A boat is double banked, when two oars, one opposite the other, are pulled by men seated on the same thwart.

Is used in psychrometry and is the temperature recorded by a thermometer whose bulb has been covered with a wetted wick and whirled on a sling psychrometer. Taken with the dry bulb, it permits determination of relative humidity of the atmosphere.

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 machine employing two or more stages.