Gross tonnage is the basis on which manning rules and safety regulations are applied, and registration fees are reckoned. Port fees are also often reckoned on the basis of GT and NT. GT and NT are defined according to formulas which take account, among ot ...

A wooden bar which may be shipped in the capstan head for heaving around by hand (to heave up anchor or heavy objects by manpower).

Open Shelter Deck ship.

The small triangular space found at the intersection of lines of position on a chart when a ship's position is determined by taking three bearings.

A loop shaped fitting attached to the deck, spar, boom, etc., used to secure a line or block to some part of the vessel.

A fabric, usually synthetic, used to make sails.

The fitting in the bottom of the boat in which the bottom or heel if the mast sits.

A watch tackle (small, handy block and tackle for general use).

An absolute temperature scale. The kelvin unit of thermodynamic temperature, is the fraction 1/273,16 of the thermodynamic temperature of the triple point of water. The triple point of water is the equilibrium temperature (0,01

A naval rank next below that of lieutenant-commander, which is next below that of captain (the equivalent of commander).

Light, bulky articles.

See Intracoastal Waterway.

Said of an object that is secured to another; attached, fixed, secured.

A warning from aloft (heads up).

A small tapering flag, which can be used for identification or communication.

The power that is consumed to overcome the frictional losses when operating in an unloaded condition.

To leave a ship without authority (deserting).

Said of a vessel when stopped and lying near the wind in heavy weather. See Heave To

To windward, in the direction of the eye of the wind; toward the wind; in the direction from which the wind is coming

To watch a vessel at anchor at the turn of tides, and cast her by the helm, and some sail if necessary, so as to keep turns out of her cables.