Manta Ray: US’ Top-secret Submarine Drone Spotted; America’s Answer To China In Underwater Warfare?

A few Google Maps users were investigating the coasts surrounding Naval Base San Diego. They discovered a top-secret autonomous submarine developed by the U.S. Navy for long-range underwater missions. The aquatic drone named the Manta Ray could emerge as a formidable asset for the U.S. in possible future warfare with China. Watch this video for all the details.