Propagation of energy in free space by virtue of joint, undulatory variations in the electric or magnetic fields in space, (i.e., by electromagnetic waves).

Increasing coupling used on hose, pump, or nozzles to permit connection of a larger size of hose.

A radio signal station that automatically relays a radio transmission, sometimes over a different frequency, thereby increasing the range of transmission. Repeaters are often named for the mountaintops or peaks where they are installed.

A set number of resources of the same kind and type that have an established minimum number of personnel, common communications, and a leader.

One or more parcels of land having a common set of fire management objectives.

The evaluation and interpretation of measurements, intelligence, and other information to provide a basis for decision-making.

Classification of indicators into a variety of categories based on how they are formed and the types of material they are found on.

The rate of decrease of temperature with height of a parcel of dry air lifted adiabatically through an atmosphere in hydrostatic equilibrium. Numerically equal to 9.7670 C degrees per km or about 5.40 F degrees per thousand feet.

A tank, a live hose reel or tray, an auxiliary pump, and an engine combined into a single one-piece assembly which can be slipped onto a truck bed or trailer.

A layer of foam which forms an insulating and reflective barrier to heat and is used for fuel protection, suppression, and mopup.