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.

Tanks, doors, and release mechanism installed in aircraft for cascading fire retardants.

A circle graduated in 360 degrees in a clockwise direction from true (astronomic) north.

An airtanker is "on final" when it is on line with the target and intends to make the drop on that pass; also applies to cargo dropping.

An agency form used to calculate helicopter allowable payload.

Geographic subdivision of a fire-protected area, delimiting the initial attack bounds of a single fire guard or fire crew.

Effect of wind on smoke, retardant drops, paracargo, smokejumper streamers, etc.

The potential fire loss a community is willing to accept rather than provide resources to reduce such losses.