第一百七十二章 偏移量
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另一个更重要的原因是……这时代的测距仪还是老大的一个玩意，狙击手带在身上实在不方便，在战场上拿着这么大的一个玩意在那瞄来瞄去也无异于是找死，于是我根本就没有要用这玩意的打算。
不过好在战士们有两手……进入狙击连的这些战士个个都是神枪手，也就是在以前就有要当丰富的射击经验，于是这判距的问题对于他们来说自然就不难了。
最实用的就是用步枪瞄具来判距……当人体占满准星时，差不多就是70米，占二分之一时就是140米，占三分之一就是350米……以此类推很快就可以算出500米开外各目标的距离。
还有战士们称作“声光法”的……顾名思义这“声光法”指的就是根据声音速度和光速的不同用测距，比如看到敌人迫击炮手在打……看到炮口发出火光时就开始数，一，二，三，四，五……数到五时听到了炮声，于是就乘以110，得到了距离为550米。
我得承认，自诩为一名狙击手的我从来就没有想过还可以用这些方法来测距……我以前打枪好像都是凭着直觉，现在听战士们这么一说……还真觉得自己能打中目标有许多运气的成分在里头。
不过不管是直觉也好，运气也好……这时知道了这些方法并把这些方法在靶场上试一试，发现还真管用，于是对我自己来说也是一种提高。
这就充分证明了一句话：“群众的智慧是无限的。”
接下来就会有另一个问题……目标往往不是固定不动的。
当然，如果我们的对手是越军狙击手的话，那更多的是需要观察、分析，然后判断出对方的位置并射击，这时候射击的目标很有可能就是固定不动的……但这样的情况必竟是少，多数时候就算是越军狙击手也会不断的更换阵地。
于是首先就要知道一些简单的数据……步兵行进速度大慨每秒1.5米，跃进速度大慨每秒3米，奔跑大慨每秒4.5米，车辆慢速每秒4米，中速每秒8米，快速每秒12米……
然后就可以根据这速度计算偏移量……这计算偏移量说起来简单，但真要计算的时候就不是那么容易了。
首先是弹头飞行时间，这个时间是靠目标的距离及子弹的飞行速度计算出来的。
接着就是偏移量=目标运动速度弹头飞行时间目标运动方向与水平角的正弦值。
前面两个还好说，目标运动速度和弹头飞行时间嘛……这些差不多都是死的，这其中弹头飞行时间可以说是活的，但实际上子弹的速度咱们事先知道，然后不同的距离我们也可以事先计算出飞行时间，比如三百米飞行是时间是多少，三百五十米飞行时间是多少……这些都可以事先背下来。
困难的就是后面角度的正弦值……
于是就不用说了，又是像之前练习炮兵战术一样的一大堆的数学训练，做乘法，背正弦值等等，而且这里还要求要快……原因是我们打的是人，而且这个人还是战斗经验丰富的越鬼子，他们是不会在一段时间内作极有规律的运动的。
所以，如果要想在远距离上打中目标，就必须得在最快的时间内就像下意识那样就要把这偏移量给计算出来。
不过我却觉得这完全是有必要的，甚至我觉得还有必要让他们学习炮兵坐标的观测，因为我很清楚：狙击手有时并不只是打打枪，很多时候他们都可以为炮兵提供坐标引导炮火对目标进行轰炸。
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