Bearing by true north rather than magnetic north.

A pre-determined complement of tools, equipment and/or supplies stored in a designated location, available for incident use.

Hose commonly of cotton, linen, or synthetic fiber construction without rubber tube or lining, often used for wildfires because of its light weight and self protecting (weeping) characteristics; such hose is attached to first-aid standpipes in buildings. At a specified flow, friction loss in unlined hose of a stated diameter is about twice that of lined fire hose. 

Characteristics fire cone-shaped pattern left by a fire on a wall, at or near its point of origin.

Radio frequencies from 300 Megahertz (MHz) to 3,000 MHz with a normal range of less than 50 miles. Radio frequency common to military aircraft and used in the logistics radio system. The most common frequencies used by fire and public safety are from 406 MHz to 512 MHz. 

Two attached straight stream nozzle tips of different orifice size used to increase or restrict water flow.

Prescribed burning or use of wildland fire during the photosynthetically-active growing season, where live fuel moistures are relatively high and the dominant vegetation, grasses, forbs, and herbaceous vegetation are fully greened.

A reference to a working fire.

A Fire Weather Watch is issued to advise of conditions which could result in extensive wildland fire occurrence or extreme fire behavior, which are expected to develop in the next 12 to 48 hours, but not more than 72 hours. In cases of dry lightning, a Fire Weather Watch may be issued for the next 12 hours. 

Term used by fire weather forecasters to alert forecast users to an ongoing or imminent critical fire weather pattern.