The passing of several turns of line across the jaw of a hook to prevent something on the hook, such as an eye or a line, from jumping clear.

The typical winds for a particular region and time of year.

Are of two kinds: First, those built in permanently and part of the ship's structure, used for the reception of water ballast, fuel, oil, or liquid cargo; second, those constructed specially and removable if necessary. These vary greatly in size and shape ...

a filter medium that retains contaminants primarily within tortuous passages.

Is any gas or gas mixture that contains no water vapor and/or in which all of the constituents are substantially above their respective saturated vapor pressures at the existing temperature.

A certificate issued by the U.S. Department of Agriculture to satisfy import regulations of foreign countries; indicates that a U.S. shipment has been inspected and found free from harmful pests and plant diseases.

An order to hold a vessel on the course she is heading.

Depending upon as a condition

Sudden and rapid flow of tide in certain rivers and estuaries which rolls up in the form of a wave. also known as Eagre.

Loss of effective propeller thrust caused by the blades cutting across the column of water sucked along by the propeller instead of working in it. Can also lead to heavy vibration of the vessel.

Let the sail out by easing the sheet.

2,204.6 pounds or 1,000 kilograms.

The structure perpendicular to the shoreline to which a vessel is secured for the purpose of loading and unloading cargo.

A verb with a variety of meanings. To round in is to haul in quickly; to round up is to bring a sailing vessel head into the wind; to round down a tackle is to overhaul it; to round a mark is to pass a racing mark.

An arc of a circle in which certain types of navigational lights known as sector lights are visible.

Load/unload control system that tries to maximize compressor efficiency by matching air delivery and air demand. Compressor is operated at full load or idle.

Devices that may be used to position the impeller or to protect the shaft.

Swing of the boom from one side of the ship to the other when the tack is changed.

When flogging a seaman, to run the fingers through the Cat-O'-Nine-Tails after each stroke to separate the strands in preparation for the next stroke.

Small iceberg that has broken away from a larger iceberg.