Raytheon and Composite Energy Technologies (CET) have successfully demonstrated the undersea launch capabilities of HADALUS, a new, low-cost, long-endurance unmanned undersea vehicle (UUV). During a recent U.S. Navy exercise, the UUV completed a series of at-sea missions on a Navy undersea test range, successfully demonstrating its undersea launch capabilities while submerged. HADALUS is a 34‑foot UUV with a six‑foot cross section and more than 2,000 nautical miles of endurance. Designed to cost roughly one‑third to one‑fifth of comparable long‑endurance vehicles, HADALUS offers a scalable path to fielding affordable undersea capabilities. In less than 18 months, Raytheon and CET progressed from a conceptual sketch to a complete prototype successfully demonstrated in water.