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Wildfire perimetersGPS is also a new asset for mapping the perimeters of wildfires, but there are problems. Walking the fire line with a GPS unit is too dangerous, and flying the perimeter in a helicopter equipped with GPS or mapping by hand from the air at a safe distance aren''t often feasible. During the initial stages of a wildland fire, helicopters are usually busy with the more critical task of dropping water.The Los Angeles County Fire Department has found a third alternative. It has equipped bulldozers with built-in GPS units, a scheme that''s proved to be valuable because it takes the guesswork out of where a bulldozer line exists. The GPS receivers in these bulldozers have removable PC Type II cards that can be processed with associated mapping software. However, this bulldozer line typically makes up only a part of the fire line, the rest of which must still be mapped by other means.

With mapping and routing software installed in each vehicle, fire captains who call out directions can instantaneously receive incident addresses and routing information from the computer-aided dispatch. The map automatically displays the quickest route and re-centers itself when the route goes off the computer screen. As the vehicles near the incident, captains can scan the map on the screen to find the locations of the nearest fire hydrants, as well as any potentially hazardous materials in the area.

Electric radiant heaters are one of those technologies that seldom get a glance from me. And maybe that''s why I was attracted to this exhibit. I didn''t see anything I recognized. I walked over to see what those black crates were that BBC Industries was exhibiting. They didn''t look like much, and then the radiant heat hit me. Thermazone Black Body radiant heaters are simple, unpretentious and are available in sizes from 450 watts to 6,000 watts.A former employer of mine, Novar Controls Corp., shocked me out of my shoes with its exhibit. The old Tesla coil spark machine was gone but Novar''s entire line of building controls has undergone a complete redesign, which includes attractive packaging, enhanced communications and new product names. In particular, the product renamed Lingo can now converse with almost all manufacturers'' equipment in their own protocols, including Lon Works and BACnet.