The shipborne missile is considered as an on-board device when it is on duty and an aircraft when it is in flight. GJB151B-2013 specifies that the shipborne platform equipment needs to be tested by the CS106 project. Nevertheless, the missile is not directly connected to the ship's power grid. If the assessment is still based on the spike signal index specified in GJB151B-2013, it is obvious that there exists a case of over testing. In view of the tailoring requirements of the shipborne missiles in the electromagnetic compatibility CS106 index, the evaluation requirements are fully analyzed and studied, and experimental cutting recommendations are derived.