The US Navy’s unmanned ‘Manta Ray’ submarine, designed to operate in coastal waters, has successfully completed its first at-sea testing, bringing it one step closer to deployment in 2024. The Manta Ray is a long-endurance, multi-role unmanned undersea vehicle (UUV) that can operate autonomously for extended periods. During the test, the UUV demonstrated its ability to navigate and operate safely in a real-world maritime environment. The Manta Ray is expected to play a crucial role in intelligence, surveillance, and reconnaissance missions, as well as mine countermeasures and offensive operations. Its modular design allows for the integration of various payloads and sensors, enhancing its versatility. The successful sea test marks a significant milestone in the development of this cutting-edge technology, which aims to enhance the US Navy’s maritime capabilities while reducing risks to human personnel.