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.

Booster hose carried full of water during mild weather to speed discharge of water on fire without filling or priming from tank.

Any obstruction to the spread of fire. Typically an area or strip devoid of combustible fuel.

A small ridge which extends finger-like from a main ridge.

To detach two pieces of hose by backing the swivel thread off the nipple thread.

Pollutants deemed most harmful to public health and welfare and that can be monitored effectively. They include carbon monoxide (CO), lead (Pb), nitrogen oxides (Nox), sulfur dioxide (SO2), ozone (O3), particulate matter (PM) of aerodynamic diameter less than or equal to 10 micrometers (PM10) and particulate matter of aerodynamic diameter less than or equal to 2.5 micrometers (PM2.5). 

Management of wildfire or prescribed fire to meet resource objectives specified in land/resource management plans.