Northrop Grumman's highly reliable LN-251 INS/GPS has various advantages, including light weight, low cost and high performance. The LN-251 fiber-optic gyro (FOG) employs one of our most modern technologies and includes three independent navigation solutions: blended INS/GPS, INS-only, and GPS-only. The non-dithered, low noise FOG technology eliminates self-induced acceleration and velocity noise. Additionally, Standard Positioning Service GPS (coarse/acquisition code) is available. Our LN-251 has independent and programmable inputs and outputs for flight controls and avionics. The LN-251 has a non-dithered inertial sensor that allows additional accurate velocity measurements and is available in 0.8, 1.0 and 2.0 nmi/hr classes of performance. The system is capable of AR-57 shipboard alignment.

LN-251 Growth Potential

The LN-251 is available with an integrated high anti-jam GPS subsystem and has the ability to integrate with M-Code, when available. The LN-251 is currently capable of supporting a Joint Precision Approach and Landing System solution and will continue to integrate with other DGPS solutions, including ZNAV™. In the near future, the LN-251 will possess a self-contained Real Time Kinematic solution for refueling or precision landing.