One quadrillion Btu. (1,000,000,000,000,000 Btu)

(1) A nautical instrument, on the arc of which is a finely graduated scale showing degrees and minutes, with adjustable reflectors, etc.; used to find the altitude of heavenly bodies, angular distances, etc. (2) On a steering gear, the rudder quadrant is ...

A very sensitive electrostatic electrometer for measuring small potential differences.

Unlicensed members of the engine department who attend to a fully automated engine room.

A category of electric power producer established under the Public Utility Regulatory Policy Act (PURPA) of 1978, that includes small-power producers (SPP) who use renewable sources of energy such as biomass, geothermal, hydroelectricity, solar (thermal a ...

A restraint placed on an operation to protect the public against a health hazard. A ship may be quarantined so that it cannot leave a protected point. During the quarantine period, the Q flag is hoisted.

A harbor restriction placed on a ship which has an infectious disease on board, or which has arrived from a country where such a disease is prevalent. The crew may not go ashore until the ship is granted pratique.

Restricted or prohibited intercourse due to contagious disease.

That portion of a vessel's side near the stern.

A bunk which runs under the cockpit

Boat carried at davits on quarter of ship, and kept ready for immediate use when at sea.

Line led forward, from quarter of a vessel, to prevent her from moving astern.

The part of the upper deck which is abaft the mainmast, or in that general location of a ship without one. The quarterdeck was normally reserved for officers.

A sea on the quarter (coming from a side of the stern).

An able-bodied seamen entrusted with the steering of a vessel when entering or leaving a harbor. He is also involved with the use and upkeep of navigational equipment.

A vessel's station bill showing duties of crew.

An approximation to the complete equations describing atmospheric motion in which only the terms most important for the growth and decay of synoptic scale extratropical weather systems (i.e., the large areas of high and low pressure seen on weather maps) ...

A solid wharf or structure built of stone along the edge of a harbor used for loading and offloading of cargo, and embarkation and disembarkation of passengers.

A structure attached toland to which a vessel is moored. See also Pier and Dock.

A cargo-discharging wharf.