Also bosun, bos'n, bo's'n, and bo'sun, all of which are pronounced bosun. The highest unlicensed rating in the deck department who has immediate charge of all deck hands, oversees deck crew, maintenance and upkeep of the ship except for the engine room an ...

Wooden swells on each side of the after end of a boom, having sheaves through which to lead the leech reefing pendants.

A worn out vessel.

Line on a chart linking points of equal depth. also known as a Depth Contour.

A contract for transportation between a shipper and a carrier. It also evidences receipt of the cargo by the carrier. A bill of lading shows ownership of the cargo and, if made negotiable, can be bought, sold or traded while the goods are in-transit.

A gangway or gangplank. Used to cross from one ship to another, or from a ship to a pier.

Chocks which hold and anchor in place either in a locker or on deck.

The post that the rudder is attached to. The wheel or tiller is connected to the rudder post.

The helmsman.

The anchor is under the hawse .

The ratio of the isothermal power consumption to shaft input.

A line that controls the angle of the sail in its relation to the wind; attached to the clew of a sail to adjust its trim (make the sail the proper shape to catch the wind).

Under ICC and common law, the requirement that a rate not be higher than is necessary to reimburse the carrier for the actual cost of transporting the traffic and allow a fair profit.

A propulsion system for boats with an inboard engine operating an exterior drive, with drive shaft, gears, and propeller; also called stern-drive and inboard/outboard.

The normal working pressure for an air motor (6 bar).

An auxiliary engine used for furnishing power for a variety of small mechanical chores.

A method of storing a sail, e.g., by rolling the jib around the headstay.

Illegal passenger who hides himself on board a ship in order to gain free passage or to escape from a country.

A running light allowed on some sailboats instead of the normal bow and stern lights. The tricolor light contains the red and green side lights and the white stern light in a single fitting that is attached to the top of the mast.

A pole used as part of the sailboat rigging, such as masts, booms, gaffs, yards, etc. A vertical spar is a mast.