Retroengine's firing time must the accuracy control, the firing time differ 1 second, will cause the airship point of descent position difference kilometer.

动发动机的点火时间必须精，点火时间相差1秒钟，就会落点位置相差数公。

The airship establishes the returns posture immediately, the returns cabin and the advancement cabin separates, the retrofire, starts from the outer space to the earth's surface returns.

随即建立返回姿态，返回舱与推进舱分离，动发动机点火，开始从太空向地球表面返回。