Highest altitude above sea level at which a helicopter can hover at maximum computed gross weight. It is generally specified whether the quoted hover ceiling refers to hovering in ground effect (HIGE) or hovering out of ground effect (HOGE).

Minor items of equipment and all expendable items assigned to an incident.

A state agency specific accounting identifier.

Agency with primary responsibility for fire suppression on any particular land area.

Water storage tank for fire protection and sometimes community water service that supplies water by gravity pressure.

Fuels of large diameter such as snags, logs, large limbwood, which ignite and are consumed more slowly than flash fuels.

Transportation of fireline personnel to and/or from assigned fireline locations.

According to the American Meteorological Society, background, environmental, or surrounding air.

An incident that is a scheduled non-emergency activity (e.g., sporting event, concert, parade).

General term for manifestations of convection in the atmosphere, alluding particularly to the development of convective clouds and resulting weather phenomena, such as showers, thunderstorms, squalls, hail, tornadoes, etc.