Design controls designates the application of a formal methodology to the conduct of product development activities.

The depth in meters (feet) of water equivalent to the maximum pressure which the underwater unit is designed for and approved to operate, measured to the lowest part of the unit.

The maximum pressure which the hyperbaric chamber is designed for and approved to operate.

The peak heating or cooling load used to select the equipment for a system (such as a heat pump) and to design the air distribution system (supply air diffusers, return air grilles, and the duct system).

Temperatures that the ground loop is designed to stay above during the heating mode and below during cooling mode.

The maximum effective recharging interval for life support, compressed air and electrical systems which the underwater vehicle or hyperbaric chamber is designed for and approved to perform the intended function under normal operating conditions.

Outdoor air temperatures that coincides with the peak seasonal heating or cooling load.

The pressure which each piping system element is designed for.

A design review is a milestone within a product development process whereby a design is evaluated against its requirements in order to verify the outcomes of previous activities and identify issues before committing to - and if need to be re-prioritise - further work.

The maximum temperature which each piping component is designed to operate at.

A specific temperature used in calculating the cooling load of a building.

A specific temperature used in calculating the heating load of a building.

The days saved by loading or discharging quicker than stated in the charter party. The charterer may seek compensation if a provision exists to this effect.

Port that a vessel is bound for.

Destructive distillation is a chemical process in which decomposition of unprocessed material is achieved by heating it to a high temperature. The process breaks up or 'cracks' large molecules.

A chemical process for the removal of sulfur from a material.

The removal of sulphur and sulphur compounds from gases or petroleum liquids.

A device for recovering superheat from the compressor discharge gas of a heat pump or central air conditioner for use in heating or preheating water.

The determination of the location of survivors or survival craft, (SOLAS , Chapter III). See also Lifesaving.

Deuterium (also known as heavy hydrogen) is a stable isotope of hydrogen.