Active safety mode needs CAM (collision avoid maneuver) to avoid the collision, and the in-plane CAM takes appropriately smaller velocity than the out-of-plane CAM.

• （3）航天器再对接策略。在导航系统出现故障或其它原因不得不中止逼近过程的情况下，撤退至最终逼近段进入点，排除故障后，准备再对接。