A document required and issued by some national governments authorizing the importation of goods.

The dimensions of all parts which go into the construction of a ship's hull.

The depth of the boat below the waterline; the amount of vertical distance from a boats water line to the bottom of it's keel.(2) The depth of water necessary to float a vessel(3) The belly or chord depth of the sail, its fullness

Navy term meaning to change the arrangement of the colors (the national flag) upon getting under way or coming to moorings.

Said of a vessel when unable to maneuver.

A single inlet compressor with the impeller or impellers mounted on a shaft supported by two bearings in a pedestal, with the driver coupled to the compressor shaft.

Used in emergencies, this is a container which allows oil to drip into the sea in heavy weather. An oil slick is produced which prevents waves from breaking over the deck of a boat.

The maximum continuous operating pressure as designed by the manufacturer.

An object that might not allow safe operation. A group of rocks just under the water or a submerged wreck could be a navigational hazard.

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

Something that covers or protects the filter assembly.

Components subordinate to the compressor.

Strop inserted between two hawsers, and weaker than the hawsers, so that strop, and not hawsers, will part with any excessive strain.

An arrangement whereby a steamship company, under rules and regulations established in the freight tariff of a given trade, accepts small packages at rates below the minimum bill of lading, and issues a parcel receipt instead of a bill of lading.

The ability of a filter to remove specified test contaminants under specified test conditions from a specific test fluid, air, gas or liquid. Expressed as a percentage of the quantity of test contaminant introduced into the inlet of the filter test system

Indicates the jib or staysail being boomed out on the opposite side of the mainsail in a following wind, giving a large amount of sail area presented to the wind. see Wing and Wing

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

Short pieces of line fastened to the sail at reef points, used for tying a reef to reduce sail area. The reef line will pass through reef cringles, which will become the new tack and clew of the reefed sail.

A drum of a windlass for heaving in line.

A halyard used to raise the spinnaker.