Amount of heat released to the atmosphere from the convective-lift fire phase of a fire per unit time.

A wildland fire that is controlled by a strong consistent wind.

A line or set of lines, usually in 50' increments, used in external load operations that allow the helicopter to place loads in areas in which the helicopter could not safely land.

The general term used to describe the maximum overnight value of atmospheric relative humidity.

Bearing by true north rather than magnetic north.

A pre-determined complement of tools, equipment and/or supplies stored in a designated location, available for incident use.

Hose commonly of cotton, linen, or synthetic fiber construction without rubber tube or lining, often used for wildfires because of its light weight and self protecting (weeping) characteristics; such hose is attached to first-aid standpipes in buildings. At a specified flow, friction loss in unlined hose of a stated diameter is about twice that of lined fire hose. 

Characteristics fire cone-shaped pattern left by a fire on a wall, at or near its point of origin.

Radio frequencies from 300 Megahertz (MHz) to 3,000 MHz with a normal range of less than 50 miles. Radio frequency common to military aircraft and used in the logistics radio system. The most common frequencies used by fire and public safety are from 406 MHz to 512 MHz. 

Two attached straight stream nozzle tips of different orifice size used to increase or restrict water flow.