Pilots and crew of the U.S. Navy's F/A-18E/F and E-2C aircraft will continue to get accurate position and targeting information for carrier-based operations through a contract for 55 LN-92 aircraft inertial navigation systems (INS) from Northrop Grumman Corporation's Navigation Systems Division. The self-contained LN-92 INS provides aircraft position, velocity, acceleration, heading and attitude information. program manager. "The LN-92 performed superbly in Operation Iraqi Freedom. the Navy's F/A-18E/F and E-2C aircraft. 12-month period between August 2004 and July 2005. contains an option for 50 additional systems. contracts.