A calculated reduction in actual payload to provide a margin of safety.

Set of computerized FIREMODELS run during fire season at the operations coordination center on preselected locations to indicate possible fire spread from those points for that date.

Personnel who have reported to the incident without an assignment (i.e., they are not assigned to an increment, strike team, or organizational unit).

Thickness of a liquid, the degree to which it resists flow.

Term used to describe any facility that is used for the coordination of agency or jurisdictional resources in support of one or more incidents.

The mathematical average of the maximum and minimum relative humidities measured at a fire weather station from one basic observation time to the next.

Time of day required to record meteorological data at a fire danger station.

The speed of the wind measured at the midpoint of the flames, considered to be most representative of the speed of the wind that is affecting fire behavior.

Individual responsible to the Deck Coordinator for the manifesting, loading and unloading of personnel, equipment and cargo.

A heavy duty plowshare or disc plow usually pulled by a tractor to construct a fireline.