Independent navigation function is one of the important functions of CNI system. Because of limited CNI communication resources, the number of CNI support locating message isn’t enough to meet locating requirement. When they move at a high speed and in the form of a quick curve, CNI locating members are provided with poor locating precision and incontinuous location. A method of aiding CNI members to improve independent navigation capacity by using non-support locating messages is presented, greatly increasing the locating precision and continuous location of the CNI locating members.