方向提前量 meaning in English

lateral lead

Indirect firing is mainly in solving method of ballistic eguatron and how to realize the resolution of firing data and auto - loading data ; the direct firing is the major part . the article has analyzed the short comings of traditional fighting method and has given us the definite method of firing data of semi - direct firing and lateral lead , especially the completely analyzing to the revising guestion which is considered and has raised the solving method ; the article has also given us the resolution method on the different influence which shipped gun should considered and on the movement of boat and warship
间瞄射击主要在弹道方程的解法和如何实现射击诸元的解算和自动装定；重点在直瞄射击，文中分析了传统战法的不足，给出了直瞄射击、半直瞄射击的射击诸元和方向提前量的确定方法，特别是对应予考虑的修正问题进行了全面的分析，提出了解决的办法；对船载炮射击应考虑的诸因素影响和船、舰的运动均给出了解算方法。