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F-117 Nighthawk: Local Tangent Plane Primacy in Action
In the 1991 Gulf War, the F-117 stealth fighter operated under extreme conditions with minimal external signals. Its inertial navigation system established a local tangent plane reference frame during ground alignment and maintained this flat reference for all real-time attitude, heading, and velocity computations. This case directly demonstrates that the local tangent plane served as the primary methodological reference frame, even across hundreds of kilometers in combat operations. Scale did not override it. Full analysis and evidence from technical practice now available. #PlanarEarth #LocalTangentPlane #F117