HRL Laboratories has achieved a significant milestone in undersea propulsion innovation by introducing a cutting-edge magnetohydrodynamic (MHD) pump powered by hydrogen. This breakthrough technology, developed in Malibu, California, utilizes a recirculating electrochemical hydrogen cell to drive the MHD pump, which offers remarkable efficiency, reliability, and quiet operation. The unique design of the device minimizes gas bubbles, ensuring a gas-free and silent pumping process. Additionally, the system avoids the generation of corrosive elements, enhancing the longevity of the electrodes. The MHD pump, which operates without rotating mechanical components, harnesses a magnetic field and an electric current to propel marine vessels through seawater, offering a promising alternative to traditional propeller-based systems. HRL's concept includes specialized gas-diffusion electrodes that facilitate the diffusion of hydrogen gas to optimize performance and prevent the formation of corrosive bubbles. The successful demonstration of this innovative technology has paved the way for further development and testing, with potential applications in the U.S. Navy's marine systems. Collaborating with partners like General Atomics and the University of Illinois, HRL is poised to revolutionize undersea propulsion and contribute to advancing green, efficient marine technologies.