航空护林是护林防火工作的重要组成部分,巡护飞行是航空护林工作的重要一环,护林航线的选择,在发现火情,扑救林火等方面举足轻重。随着航空护林基地的增加和社会经济条件的变化,多年使用的四角护林航线愈来愈表现出它的不足;航线长度长,检查点少,巡护飞行死板,机动灵活性差,巡护间隔时间长,有火难以早发现,火情发现率低,初次发现面积大,无效巡护飞行时 Aviation forest protection is an important part of forest fire prevention work. Patrol flight is an important part of aviation forest protection work. The choice of forest protection route plays a decisive role in the detection of fire and forest fire. With the increase of aviation forest base and the change of socio-economic conditions, the use of the quadrangular forest shelterbunking for many years has shown its deficiencies more and more. The routes have long length, less check points, rigidly patrolled flights, poor maneuverability, Long, difficult to find early fire, low detection rate of fire, found for the first time a large area, invalid Patrol flight