To change a boat's direction, bringing the bow through the eye of the wind.

A positive displacement type compressor.

A pallet designed so that the forks of a fork lift truck can be inserted from all four sides. See Fork lift.

An instrument designed to add lubrication into the compressed air line.

The area of sea not under the sovereignty of nations with a seaboard.

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

(1) A round eye through which a line is led, usually in order to change the direction of pull. (2) A thick piece of glass set flush in the deck to admit light below.

A mast supported by the use of lines or wire known as stays and shrouds.

Long-range navigation system that uses radio signals transmitted at specific times. An onboard receiver computes position by measuring the difference in time of signal reception. This system is being phased out in favor of GPS.

Shell or body of a ship.

An old seafaring dish made of boiled oatmeal seasoned with salt, sugar, and butter.

A call on the bo'sun's pipe at night for the hands to turn in, for silence in the messdecks, and for lights to be extinguished. Also a term used by a sailor to another to make them stop talking.

Seaman's name for a reef knot tied upside down. also called a "granny" knot.

To remove a reef from a sail and hoist the sail aloft

Any system, usually block & tackle or hydraulic, used to hold the boom down. This is useful for maintaining proper sail shape by exerting a downward pull on the boom, particularly when running or on a broad reach.

A person in command of a ship. A person certified as competent to command a ship. A master mariner.

A time draft under a letter of credit that has been accepted and purchased by a bank at a discount.

The horsepower required to isothermally compress the air or gas delivered by the compressor at specified conditions.

A sail plan in which the main and/or mizzen, or the foresail of a schooner, is of triangular shape, very long in the luff and set from a tall mast. This is almost now universal in all sailing yachts.

A hard-chined dinghy with flared sides, considered a useful weight-carrying work boat.