An NDVI-derived image of vegetation greenness compared to its average greenness for the current week of the year.

The central point or area of a weather system associated with increased winds, clouds or precipitation (or any combination thereof).

Direct attack around a fire in opposite directions by two or more attack units. Usually conducted from the fire's tail to head.

Aircraft orbiting the rendezvous area; usually refers to vertical deployment at 500-foot (150 m) altitudinal separation between aircraft.

A frame on which hose is wound, now chiefly used for "booster" or small hose (3/4- or l-inch hose) (19 or 25 mm) supplied by a water tank on the apparatus; also, a hand-drawn 2-wheel frame for 2-1/2 inch (64 mm) hose used in industrial plants.

Term used in flight planning/following to document time of arrival at a point.

An array of fuels usually constructed with specific loading, depth, and particle size to meet experimental requirements; also, commonly used to describe the fuel composition.

All personnel and equipment available or potentially available for assignment to incidents.

A Heat Low which is elongated in shape.

A valve with a gate-like disk that moves up and down at right angles to the flow when actuated by a stem screw and hand wheel. Gate valves are best for service that requires infrequent valve operation and where the disk is kept either fully open or closed.