Maximum computed gross weight minus equipped weight of a helicopter.

Sky cover through which higher clouds or the sky can be detected.

Living plants, such as trees, grasses, and shrubs, in which the seasonal moisture content cycle is controlled largely by internal physiological mechanisms, rather than by external weather influences.

Group of fuels possessing common characteristics. Dead fuels are grouped according to 1-, 10-, 100-, and 1000-hour timelag, and living fuels are grouped as herbaceous (annual or perennial) or woody.

Fuels with no living tissue in which moisture content is governed almost entirely by absorption or evaporation of atmospheric moisture (relative humidity and precipitation).

A person assigned to operate a fire hose nozzle, usually on a handline.

Small capacity spray jet produced at very high pressures (greater than 250 psi, the normal maximum pressure for standard ground tankers) and discharged through a small hose with a gun-type nozzle.

Fire suppression tool, sometimes improvised, used in direct attack for smothering out flames along a fire edge; may consist merely of a green pine bough or wet sacking, or be a manufactured tool such as a flap of belting fabric fastened to a long handle.

A fire tool that consists of a thick, flat piece of rubber on a long handle used to drag over or smother out flames of grass fires.

Resources, together with a complement of overhead personnel, calculated to be sufficient to provide fire efficient incident management.