Ground Support Unit staff provide ground transportation in support of incident operations. They maintain and repair vehicles and mobile ground support equipment and perform pre- and postuse inspections on all ground equipment assigned to the incident. The staff supply fuel for incident mobile equipment, and develop and implement the incident Traffic Plan. Additionally, during major incidents, Ground Support Unit staff maintain a transportation pool of vehicles (e.g., cars, buses, pickup trucks) suitable for transporting personnel, as opposed to tactical vehicles such as ambulances.

The aerated solution created by forcing air into, or entraining air in water containing a foam concentrate by means of suitably designed equipment or by cascading it through the air at a high velocity. Foam reduces combustion by cooling, moistening and excluding oxygen. 

Navigation of aircraft by visual reference to landmarks.

Unit of wildland delineated by logical and strategic topographic features for preattack planning.

A load that is carried or extends outside of the aircraft fuselage.

A permanent facility for the operation of helicopters which has been built to FAA standards and which is marked on aeronautical charts. Natural resource agencies refer to agency heliports as permanent helibases.

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.