Such trilateration is liable to rapid accumulation of azimuth error.

三边测量锁方误差容易迅速积累。

Abstract: It is possible to fulfil prelaunch azimuth alignment by means ofcombination angle measurement at the launch site without preparation.

战术弹(部件)在无准备阵地，利用组合(测角)功能，可以完成射前方对准，是本文想阐明主要观点。