According to the American Meteorological Society, the bottom layer of the troposhpere that is in contact with the surface of the earth. It is often turbulent and is capped by a statically stable layer of air or temperature inversion.

Repeat burning of an area over which a fire has previously passed, but left fuel that later ignites when burning conditions are more favorable.

The point or points of origin of an incendiary fire.

The stratum containing the crowns of the tallest vegetation present (living or dead), usually above 20 feet.

Fire suppression activities by other than regular fire suppression organizations or a fire cooperator.

A location from which fires can be detected and reported.

Any ground vehicle providing specified levels of pumping, water, and hose capacity but with less than the specified level of personnel.

A secondary pump on an engine in addition to the main pump. Usually of small capacity.

A reel for the booster hose mounted on a fire engine, often supplied by the auxiliary pump. This reel usually carries a 1-inch (25 mm) or 3/4 inch (19 mm) hose and frequently contains an electric rewind mechanism.

A rotating drum used for winding booster hose (normally) for storing and dispensing.