A theoretical concept that is used to model and classify crown fire. It may be observable after the fact in burn severity assessments.

The committee or subgroup that is assigned to manage an incident position

Level of risk as determined by the risk management process which cannot be mitigated to an acceptable safe level.

High fire frequency over a short period of time in an administrative unit, usually overtaxing the normal initial attack capability of the unit.

A system of navigational satellites operated by the U.S. Department of Defense and available for civilian use. The system can track objects anywhere in the world with an accuracy of approximately 40 feet.

The characteristic configuration of char left by a fire. In wildland fires burn patterns are influenced by topography, wind direction, length of exposure, and type of fuel. Definitions are scale-dependent: (1) They can be used to trace a fire's origin; (2) They are influenced by severity and intensity within a stand; (3) They describe the landscape mosaic.

A fire burning far below the surface in duff, mulch, peat, or other combustibles as contrasted with a surface fire.

A set of points which defines the terrain as numbers for computer applications. This data may be used to draw contours, make ortho photos, slope maps, and drive fire models.

Tracking on-shift time of incident resources. Timekeeping is accomplished on the Crew Time Report, SF-261, or the Emergency Equipment Shift Ticket, OF-297.

Wind created by differing barometric pressures between high- and low-pressure systems. Velocity is generally five to 30 miles per hour, and wind shifts are usually gradual as systems move and shift.