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林火定向定位仪是测定林火方向和林火至了望台之间距离,了望人员使用的测量仪器,也是了望台上必不可少的了望设备.但目前全国广大林区的上千座了望台,还没有安装林火定向定位仪.有的林区了望台上安装木制或硬纸制罗盘仪,用来测定火场的方位角,它不能测得观测点至起火点的水平距离;有的林区了望台上连简易的仪器也未安装,只凭一张地图,一双眼睛,采用经验的目测方法,很难报出火场的准确方向和位置,给扑火指挥带来很多困难.准确观测火情和确定起火点至了望台之间的距离,迅速
Forest fire locator is the determination of forest fire direction and forest fire to the distance between the observation deck, looking for the use of personnel measuring instruments, but also the lookout is essential on the lookout equipment.But the vast majority of the country’s forest One thousand observatory, not yet installed forest fire locator.Many forest lookout stage installation of wooden or hard paper compass, used to determine the azimuth of the fire, it can not measure the observation point to the ignition point Of the horizontal distance; some forest lookout even with a simple instrument is not installed, just by a map, a pair of eyes, the use of visual inspection methods, it is difficult to report the exact direction and location of the fire to the fire command Bring about a lot of difficulties.Observe the fire accurately and determine the distance between the ignition point and the observatory, rapidly