A tapered thread standard that is used for connecting various sizes of rigid pipe. This standard may be referred to as tapered iron pipe thread (TIPT), National pipe thread (NPT), iron pipe thread (IPT), or iron pipe standard thread (IPS). With tapered thread, the threads and pipe sealant perform the seal at the connection. This is opposed to straight thread connectors which use a gasket to form the seal. 

A wildland fuel that is suspended off the ground in such a way that fire may burn both over and under it.

Burning material at the points deliberately ignited for backfiring, slash burning, prescribed burning, and other purposes.

Level, in the vicinity of the fire, at which the smoke ceases to rise and moves horizontally with the wind at that level.

The difference in atmospheric pressure between two points on a weather map. That is, the magnitude of pressure difference between two points at sea level, or at constant elevation above sea level. Wind speed is directly related to pressure gradient. If distance between constant pressure lines is reduced by one-half, wind speed will be doubled. Conversely, if distance between lines is doubled, wind speed will be reduced by one-half. 

A fire weather fire danger product based on a thorough evaluation of all pertinent sources of meteorological, fire danger and resource information.

The cumulative effects of long-term drying on current fire danger.

Within designated blocks of land, planning the locations of firelines, fire camps, water sources, and helispots; planning transportation systems, probable rates of travel, and constraints of travel on various types of attack units; and determining what types of attack units likely would be needed to construct particular firelines, their probable rate of fireline construction, and topographic constraints on fireline construction. 

A siphon device used to fill an engine's tank when the water source is below or beyond the engine's drafting capability.

A two way radio unit on mobile apparatus (instead of base stations), usually semi-permanently attached to the apparatus.