The technology that made it possible to coordinate movement of ROVs anywhere in the world was

• A. Inertial navigation
• B. GPS
• C. LORAN
• D. Sonar

Answer: (B)

Coordinating ROVs across the globe relies on having a common, worldwide reference for where each vehicle is and when events should happen. Global Positioning System provides satellite-based position fixes and precise timing, so multiple vehicles can share the same coordinate frame and follow coordinated paths no matter where they are. This makes it the best fit for global coordination.

Inertial navigation can tell you roughly where you are using on-board sensors, but it drifts over time and doesn’t provide a universal reference across the world. LORAN is an older radio-navigation system that’s less accurate and widely replaced by GPS. Sonar helps sense the surroundings and measure distances under water, but it doesn’t give a universal position reference for global coordination.