A new class of UUV, it is an extra-large glider that will operate long-duration, long-range and payload-capable undersea missions without need for on-site human logistics. The Manta Ray can wait on the seabed to intercept nuclear submarines. DARPA's Manta Ray is an autonomous, uncrewed underwater vehicle (UUV) that can operate at depths that traditional submersibles can't reach. The Manta Ray program was launched in 2020 to improve underwater vehicle design and develop techniques to increase payload capacity and conserve energy.

Manta Ray was built through a Defense Advanced Research Projects Agency (DARPA) program aimed at advancing key technologies to benefit future UUV designs, including techniques to manage energy, increased payload capacity, low-power propulsion and more.

Manta Ray aims to develop and demonstrate a new class of long-duration, long-range, payload-capable UUVs ready for persistent operations in dynamic maritime environments. DARPA is engaging with the U.S. Navy on the next steps for testing and transition of this technology.

A second Manta Ray performer, PacMar Technologies, is continuing testing of its full-scale energy harvesting system in 2024.