The Position Location and Navigation Symposium (PLANS) is a biennial technical conference that occurs in the spring of even numbered years. Our mission is to provide a forum to share the latest advances in navigation technology. Read about the history of PLANS here.This conference is jointly sponsored by the Aerospace and Electronics Systems Society (AESS), and the Institute of Navigation (ION). The AESS is sponsored by the IEEE, which is the world's largest professional engineering organization. The ION is the world's premier professional organization for the advancement of positioning, navigation and timing.The PLANS conference is a four day conference with 1 day dedicated to tutorials and three days to technical sessions.