U.S 

Northrop Grumman's Manta Ray prototype, a buoyancy-driven underwater drone, completes successful testing off the California coast, showcasing rapid assembly and advanced energy-efficient features for diverse missions.

Northrop Grumman recently achieved a significant milestone with its Manta Ray uncrewed underwater vehicle (UUV) prototype. After undergoing in-water testing off the coast of California for a duration of two months, the prototype demonstrated its capabilities in submerged operations, utilizing various modes of propulsion and steering, including buoyancy, propellers, and control surfaces. This accomplishment was confirmed by the Defense Advanced Research Projects Agency (DARPA), which oversaw the testing process.

The transport and assembly process of the Manta Ray prototype also drew attention. Northrop Grumman transported the prototype in subsections from Maryland to California for the tests. This method not only displayed ease of transport but also highlighted the ability to assemble the vehicle rapidly in the field without occupying significant space at pier or naval facilities.

DARPA's program manager for Manta Ray, Dr. Kyle Woerner, expressed confidence in the readiness of the vehicle for real-world operations. He emphasized the significance of the successful testing in validating the vehicle's capabilities, particularly its ability to be assembled quickly in the field from modular subsections. Dr. Woerner described this capability as a first-of-its-kind for an extra-large UUV, marking a significant advancement in underwater drone technology.

The Manta Ray prototype, designed by Northrop Grumman, boasts impressive features tailored for various missions. Its long-range and long-duration capabilities make it suitable for extended underwater operations. The vehicle utilizes buoyancy-driven gliding to navigate through the water efficiently. Additionally, it incorporates multiple payload bays, allowing for versatility in mission objectives.

Energy conservation is another notable aspect of the Manta Ray prototype. The vehicle is equipped with technology that harnesses energy from the ocean's thermal gradient, converting it into electricity. This innovative feature enables the Manta Ray to operate efficiently while minimizing its environmental impact. Furthermore, the vehicle has the capability to anchor to the seafloor and enter a low-power state, enhancing its endurance and mission flexibility.

Competitor PacMar Technologies is also making strides in the development of its own Manta Ray prototype. According to DARPA, PacMar Technologies is testing its full-scale energy harvesting system in 2024, showcasing the ongoing advancements in underwater drone technology.

In summary, Northrop Grumman's successful testing of the Manta Ray prototype signifies a significant step forward in the field of uncrewed underwater vehicles. With its advanced capabilities, including rapid assembly, long-range navigation, and energy-efficient operation, the Manta Ray demonstrates promising potential for various applications, ranging from scientific research to defense missions.