Navigation progressively improved, from inertial systems to a camera with a video link, but by 1973 the drone still missed about half its targets.

• 导航系统日复一日地得到了提高：从惯性制导系统发展到拥有视频通信的摄像系统，但直到1973年，无人机仍会错过对一半的目标的攻击。