First Medium Form Factor Production Representative R-EGI Unit Delivered to Boeing St. Louis Navigation Lab for Check-Out
St Louis, MO | 19 May 2026
The first production representative Medium Form Factor (MFF) Resilient-Embedded GPS/INS (R-EGI) unit has been successfully delivered to the Boeing St. Louis Navigation Laboratory for system check-out and integration activities.
MFF Production Representative R-EGI Unit
This milestone marks a significant step forward in the maturation of the R-EGI capability and demonstrates continued progress toward providing resilient Positioning, Navigation, and Timing (PNT) solutions for future aircraft applications. The delivered unit represents a production-representative configuration designed to support laboratory evaluation, integration assessments, and functional verification activities.
The Boeing Navigation Lab check-out effort will focus on validating system interfaces, functionality, and overall navigation system performance within a controlled laboratory integration environment. Data and lessons learned during this phase will help inform future integration, environmental testing, and flight demonstration activities.
Future production representative units are ultimately planned for installation on the F-15EX, where they will support continued evaluation of resilient navigation capabilities in an operational aircraft platform.
The achievement reflects the collaborative efforts of the integrated R-EGI team, including the USAF PNT Program Office, IS4S as the Design Agent and lead integrator, General Dynamics, Kearfott Corporation, and Collins Aerospace. The combined expertise of government and industry partners has been instrumental in advancing the development and delivery of the production representative MFF capability.
“The delivery of the first production representative MFF R-EGI unit is an important achievement for the program and highlights the continued collaboration between industry and government partners,” said Lt Col Michael Switzer, USAF Material Leader, NAVWAR Branch, M-Code Aviation Joint Program Office. “This milestone demonstrates tangible progress toward delivering enhanced resilient navigation capability for future airborne platforms.”
The R-EGI open system architecture is being developed to improve navigation resiliency in contested and degraded environments by combining advanced inertial navigation technology with modernized GPS capabilities in a compact Medium Form Factor architecture.
Additional testing and evaluation activities are planned as the program continues to advance toward future platform integration and operational demonstration efforts.
For additional information, please contact Mar.Com@is4s.com.