The Vanguard demonstrates how hydrogen technology enables high-performance, mission-ready platforms without compromising on stealth or endurance. Outfitted with the Z-Class Propulsion System in place of a conventional big-block V-8 gasoline engine, the vessel achieves comparable output while delivering near-silent, low-signature operation critical for maneuvering through sensor-rich environments. This upgrade enhances range and operational flexibility beyond battery-only alternatives, supporting emerging defense priorities for low-detectability mobility at the edge of the battlefield.