A rope sewn into the luff or foot of a sail for use in attaching to the mast or boom.

Two half hitches around a spar or post. Easy way to make a line temporarily fast to a piling or post. The clove hitch can jam under heavy tension, making it difficult to untie. Worse, is its tendency to untie itself when subjected to repeated strain and r ...

Is a positive displacement reciprocating compressor using a flexible membrane or diaphragm in place of a piston.

Canvas, cloth, leather, tubing, rubber or other material placed around a line or cable to protect it from wear and abrasion

Air or vapor given off or expelled as a byproduct or result of an operation or treatment process.

The highest unlicensed rating in the deck department who has immediate charge of all deck hands and who in turn comes under the direct orders of the master or chief mate or mate.

A marine hardware store.

A spring line tied from the boat to chain rode, usually near the water's surface. It helps disperse tension forces. It also prevents damage to the boat by ground tackle and can help in the retrieval of the ground tackle in heavy weather.

A ball shaped buoy marking a navigational hazard.

The basic unit of measurement for lumber. One board foot is equal to a oneinch board, 12 inches wide and one foot long. Thus, a board ten feet long, 12 inches wide, and one inch thick contains ten board feet.

BTU. The amount of heat required to raise the temperature of one pound of water one degree Fahrenheit under set conditions of temperature and pressure.

The speed needed for a boat to begin planing.

A person or firm performing a consolidation service for others. The consolidator takes advantage of lower full carload (FCL) rates, and savings are passed on to shippers.

Statement on the condition of the vessel. The sufficiency of a vessel in materials, construction, equipment, crew and outfit for the trade in which it is employed. Any sort of disrepair to the vessel by which the cargo may suffer, overloading, untrained o ...

Said of a vessel's anchor, or cable when the amount of cable out is not more than one-and-a-half times the depth of water.

The magnetic compass used by the navigator as a standard.

Port of initial Customs entry of a vessel to any country. Also known as First Port of Call.

A compartment forward where the chain cable is stowed.

A power or sailing boat used by pi-lots (men who have local knowledge of navigation hazards of ports).

A device that indicates pressure differential above or below atmospheric pressure.