Pressure of the atmosphere at an assigned station location and elevation.

The thermal or chemical decomposition of fuel at an elevated temperature. This is the preignition combustion phase of burning during which heat energy is absorbed by the fuel which, in turn, gives off flammable tars, pitches, and gases.

An order to an airtanker pilot to return to the retardant base and await further instructions; mission completed, further loads not required.

A pump which moves a specified quantity of water through the pump chamber with each stroke or cycle; it is capable of pumping air, and therefore is self-priming, but must have pressure relief provisions if plumbing or hoses have shut-off nozzles or valves . Gear pumps and piston pumps are common examples of this type. 

The layer of the atmosphere in which the frictional force of the earth's surface exercises an appreciable influence on winds.

Electronic sensor used to record the number of lightning strokes within a predetermined range over a specified period of time.

A standard instrument approach procedure for fixed-wing aircraft in which an electronic glide slope is provided, such as ILS and PAR.

The designation of a vegetation complex described by dominant species, age, and form.

Any vehicle capable of supplying engine fuel to ground or airborne equipment.

The process in which teams of professional and peer counselors provide emotional and psychological support to incident personnel who are or have been involved in a critical (highly stressful) incident.