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.

The location of the communications unit and the message center.

According to the American Meteorological Society, the height ascribed to the lowest layer of clouds or obscuring phenomena when it is reported as broken, overcast, or obscuration and not classified "thin" or "partial." The ceiling is termed unlimited when the foregoing conditions are not satisfied.

A condition when the prevailing visibility is less than 3 miles (5 km) and rapidly increases and decreases by one or more reportable values during the period of observation.