A landing necessitated by apparent impending failure of engines, systems, or components which makes continued flight unadvisable.

Manipulation of stands of brush by manual, mechanical, chemical, or biological means or by prescribed burning for the purpose of achieving land management objectives.

Eleven principles describing tangible behaviors that reflect and demonstrate the wildland fire leadership values.

Three guiding values that should be the basis for the decisions that leaders make.

For statistical purposes, a fire burning more than a specified area of land e.g., 300 acres.

To examine a fire area to obtain information about current and probable fire behavior and other related fire suppression information.

The number and size of fires historically experienced on a given unit over a given period (usually one day) at a given index of fire danger.

A course or courses that must be completed prior to initiating a position task book. Training which has been identified as required cannot be challenged; an agency equivalent course may be used as a substitute when the course meets or exceeds a required course's learning and performance objectives. 

Firefighting assistance given to adjacent areas and nearby communities by contract or other agreement that covers conditions and payment for assistance rendered and services performed. Contrasted to mutual aid, in which neighboring firefighting organizations assist each other without charge. 

Burning of any fuel outdoors without the use of mechanical combustion enhancements.