Embedded Global Positioning System
Type: system
Definition
Embedded Global Positioning System (often referred to in DoD aviation as an Embedded GPS/INS, or “EGI”) is an integrated navigation unit that embeds a military GPS receiver inside an inertial navigation system so the platform can continuously compute accurate position, velocity, time, and orientation (attitude/heading) as a single, self-contained subsystem. In practice, an EGI blends GPS measurements with inertial sensors (gyros/accelerometers) in a tightly coupled design to provide stable navigation and pointing data for aircraft and other military platforms, including improved performance when GPS is degraded, contested, or briefly unavailable. Modern variants may incorporate military GPS user equipment such as SAASM or M-Code capabilities to support secure, more resilient positioning and navigation for operational use.
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