Any cargo carried beneath a helicopter and attached by a lead line and swivel.

Any fire crew composed of prison inmates or wards.

Specially developed coils containing explosive powder that are detonated to create a fireline through ground fuels.

The ratio of the original volume of the nonaerated foam solution to the resultant volume of foam. The inverse of expansion.

A healing or healed injury or wound to woody vegetation, caused or accentuated by a fire.

Any fire caused directly or indirectly by person(s).

The geographic scope of the landscape defined for the fire management analysis. A Fire Planning Unit consists of one or more Fire Management Units. FPUs may relate to a single administrative unit, a sub-unit, or any combination of units or sub-units. FPUs are scalable and may be contiguous or non-contiguous. FPUs are not predefined by agency administrative unit boundaries, and may relate to one or more agencies. They may be described spatially. 

An unplanned event that does substantial damage or causes serious injuries when associated with the operation of applicable aircraft. Event occurs between the time engine(s) is (are) started or rotors turning for the purpose of commencing flight, until the aircraft comes to rest with engines and propellers or rotors stopped, the brakes set or wheel chocks in place, and all persons have disembarked. 

Air turbulence occurring under and around the main rotor of an operating helicopter.

Activities to change behaviors and attitudes about fire ecology, wildland fire and the role of fire in natural resource management. Defines the purposes for actions that provide information about and improve understanding of wildland fire.