High voltage is usually referred as a voltage used for power generation. It has the potential to cause injury or damage.

Higher alkanes are alkanes having nine or more carbon atoms.

High-leg delta (also known as wild-leg, stinger leg, bastard leg, high-leg, orange-leg, red-leg, dog-leg delta) is a type of electrical service connection for three-phase electric power installations.

Hydraulic cylinders used to lift panels of stacking hatch covers during operation.

A high-pressure area, high, or anticyclone, is a region where the atmospheric pressure at the surface of the planet is greater than its surrounding environment.

An innovative cutting process for metals, refractories, glass and many other materials. It provides a very clean cut without heat distortion, and an excellent finish.

The high-temperature gas-cooled reactor is a Generation IV nuclear reactor concept that uses a graphite moderator with a once-through uranium fuel cycle.

A high-voltage, direct current electric power transmission system uses direct current (DC) for the bulk transmission of electrical power, in contrast with the more common alternating current (AC) systems.

High-voltage transformer fire barriers are outdoor countermeasures against cascading failures in a national electric grid.

A new concept for offshore loading developed by Hitec Marine AS.

The word energy derives from Greek ἐνέργεια (energeia), which appears for the first time in the 4th century BCE works of Aristotle (OUP V, 240, 1991) (including Physics, Metaphysics, Nicomachean Ethics and De Anima).

The tendency of a ship to arch up amidships as the result of improper weight distribution (too much weight put at the ends and not enough amidships).

A cable used by helicopters for lifting or lowering persons in a pick-up operation. Also a device used for lifting or lowering a load, by means of a drum or lift-wheel around which rope or chain wraps.

A large space below deck for the stowage of cargo; the lowermost cargo compartment.

The space enclosed by the ship structure in which an independent cargo tank is situated, (IBC Code).

The space enclosed by the ship structure in which a cargo containment system is situated, (IGC Code).

A tank used for collection and storage of sewage, (MARPOL).

The securing bolts which are usually fitted for fixing main propulsion machinery and thrust blocks.

Hole cleaning is the ability of a drilling fluid to transport and suspend drilled cuttings

Home energy storage devices store electricity locally, for later consumption.