Northrop Grumman Corporation's (NYSE:NOC) relative navigation solution has been selected by the U.S. Air Force for the Automated Aerial Refueling (AAR) program follow-on contract.

Relative navigation, the ability to measure the relative motions of two vehicles accurately and reliably, is critical to aerial refueling of unmanned vehicles. Northrop Grumman's solution provides a LN-251 inertial navigation system (INS) with Ethernet connectivity that runs relative navigation software.