A blowout preventer is a specialized valve or similar mechanical device, used to seal, control and monitor oil and gas wells to prevent blowouts, the uncontrolled release of crude oil or natural gas from a well.

The BN-800 reactor is a sodium-cooled fast breeder reactor, built at the Beloyarsk Nuclear Power Station, in Zarechny, Sverdlovsk Oblast, Russia.

All gear, such as pilot ladders, accommodation ladders, mechanical hoists, gangways,ramps, shell doors, etc., necessary for a safe transfer of the pilot and personnel to the ship.

The speed of a vessel adjusted to that of a pilot boat at which the pilot can safely embark.

A cradle or support for a lifeboat.

The ropes by which ship boats are lowered or hoisted.

An electric winch for handling a lifeboat.

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

A drawing that shows frame lines in elevation. Frame lines forward of the midship section are shown on the right of the center line, while those aft of the midship section on the left of the centre line.

The ship sections obtained by planes perpendicular to the centreline. They are drawn on a body plan and form part of the lines plan.

An apparatus used to produce steam, either for the main propulsion or for auxiliary machinery. A boiler is, in general, any closed liquid-containing vessel to which heat is applied

Boiler blowdown is water intentionally wasted from a boiler to avoid concentration of impurities during continuing evaporation of steam.

A boiler explosion is a catastrophic failure of a boiler.

Boiler feedwater is an essential part of boiler operations.

Fittings on a boiler to ensure its safe operation: safety valves, main steam stop valve, feed check valve, water level gauge, pressure gauge connection, air release cock, sampling connection, blow down valve, scum valve, etc.

The temperature between the exhaust gas and the water.

Hard deposit on the interior of a boiler plate or tube. The scale generally contains magnesium and calcium carbonates as well as calcium sulphate derived from the water used.

Boiler water is liquid water within a boiler, or in associated piping, pumps and other equipment, that is intended for evaporation into steam.

To reduce corrosion and scale formation in boilers, boiler water must be maintained in slightly alkaline conditions by carefully controlled addition of chemicals.

A boiling liquid expanding vapor explosion is an explosion caused by the rupture of a vessel containing a pressurized liquid that has reached temperatures above its boiling point.