Peaking power plants, also known as peaker plants, and occasionally just "peakers", are power plants that generally run only when there is a high demand, known as peak demand, for electricity.

The Pearl GTL is a gas to liquids plant based in Ras Laffan, Qatar. It is the largest GTL plant in the world.

The pebble-bed reactor (PBR) is a design for a graphite-moderated, gas-cooled nuclear reactor.

A roller fairlead usually operating in a horizontal plane. Its function is to change the direction of lead of a mooring or of other line on a deck.

Peer review is the evaluation of work by one or more people with similar competencies as the producers of the work (peers).

The pelagic freezer stern trawler AFRIKA is designed to operate in the tropics, fishing mainly for sardinella and horse mackerel.

Fish living above the bottom levels, predominantly such as herring and mackerel.

The Pelamis machine is made up of connected sections which flex and bend relative to one another as waves run along the structure.

Pellet fuels are biofuels made from compressed organic matter or biomass. Pellets can be made from any one of five general categories of biomass.

The Peltier effect is the presence of heating or cooling at an electrified junction of two different conductors.

Generally used to refer to the amount of energy generated as a percentage of annual consumption.

Pipes that feed water to water turbines in a dammed run-of-the-river hydroelectricity plant.

The patented hull form developed by Nigel Gee and Associates Ltd.

Per mille is an expression that means parts per thousand.

A seawater- and oil-resistant rubber compound used for sterntube lip seals.

A performance indicator or key performance indicator (KPI) is a type of performance measurement. KPI's evaluate the success of an organization or of a particular activity (such as projects, programs, products and other initiatives) in which it engages.

A process to ensure that a system is producing the highest performance possible.

The new industry guidance contained in the IMO Resolution MSC.215(82) provides requirements for protective coatings in dedicated seawater ballast tanks in all types of ships and double-side spaces of bulk carriers.

Performance-based regulation is an approach to utility regulation designed to strengthen utility performance incentives.

The period is the duration of time of one cycle in a repeating event, so the period is the reciprocal of the frequency.