Northrop Grumman has delivered the first production unit of the EGI-M, a modernized airborne positioning, navigation and timing system engineered to maintain accuracy in GPS-contested and denied environments.
Formally designated the LN-351, the system incorporates fiber-optic inertial navigation paired with Military-code (M-code) GPS — an encrypted, military-specific signal providing enhanced resistance to jamming and spoofing. A capability called Blended Navigation Assurance validates GPS data integrity even when signals are under threat.
The software architecture allows operators to host third-party PNT applications without manufacturer involvement, enabling integration of complementary sensors and tracking of non-GPS satellite constellations. The design completed rigorous hardware and software testing to military specifications ahead of full-scale production.
“EGI-M enhances operational effectiveness and is built with the flexibility to defeat today’s threats and adapt to future mission demands,” said Ryan Arrington, vice president of navigation and cockpit systems at Northrop Grumman. Lt. Col. Chris Grover of the U.S. Air Force described the system as enabling mission execution “where we want to, with the capability we need, at the time of our choosing.”
Upon full production, military customers will receive a unified hardware and software navigation solution designed for seamless integration across platforms.
The delivery comes as GPS jamming and spoofing have emerged as routine features of modern conflict. Across Ukraine, the Middle East, and the Baltic region, documented interference has degraded navigation for both military and civilian operators, accelerating demand for M-code-capable and multi-constellation PNT solutions across allied air forces.
