What technology developed from the Inertial Navigation System (INS) became foundational for modern navigation?

• A. Inertial Navigation System (INS)
• B. Lidar
• C. Radar
• D. GPS

Answer: (D)

Global Positioning System (GPS) became the cornerstone of modern navigation because it provides accurate, real-time position fixes anywhere on Earth by using signals from satellites. Inertial navigation relies on internal sensors to estimate position, but those estimates drift over time and need external reference to stay accurate. GPS supplies that external reference, dramatically improving reliability and global coverage. In real-world use, navigation systems often combine GPS with an inertial navigation system, using GPS to correct drift and the INS to provide high-rate motion data when GPS signals are unavailable. Lidar and Radar, while valuable for sensing the environment and aiding obstacle detection, don’t establish global position and aren’t foundational navigation systems like GPS.