In hazard reduction, burning narrow strips of fuel and leaving the rest of the area untreated by fire.

The technical and scientific specifications for management activities or potential actions mandated by the agency administrator and defined in land/resource management plans. Management requirements are derived from land/resource management plan and fire management plan standards and guidelines information. 

The dropping of fire retardants or suppressants from specially designed buckets slung below a helicopter.

Actual vehicle weight, including chassis, body, cab, equipment, water, fuel, crew, and all other load.

The amount, or mass of smoke produced per unit of time. For example: Emission Rate = Available Fuel x Burning Rate x Emission Factor.

Fire burning with a low flame and spreading slowly.

Concrete pad at a retardant base on which aircraft stand when being loaded.

Period of the year that normally comprises the fire season based on historical fire occurrence.

Objects displaying more stain deposits on the exposed surface of the object than on the protected surface of the object indicating the direction of fire progression at that location. One of the 11 NWCG categories of fire pattern indicators.

Accumulation in the forest of living or dead (mostly woody) material that is added to and rearranged by human activities such as harvest, cultural operations, and land clearing.