REMUS 620

The REMUS 620 is HII Mission Technologies' second-generation medium-class autonomous underwater vehicle (AUV/UUV), unveiled in November 2022 and manufactured in Pocasset, Massachusetts. It features a 600-meter depth rating, up to 110-hour endurance, 275 nautical mile range, speeds up to 8 knots, modular open-architecture payload bays, and WHOI Yellow Moray torpedo tube launch and recovery (TTL&R) technology. Key milestones include delivery of two units to NOAA in September 2024, validation on the US Navy confidence course in January 2025, dry checkout for Virginia-class submarine torpedo tube compatibility in July 2025, and the first successful torpedo tube recovery at Seneca Lake, NY in October 2025. The vehicle autonomously executes its underwater missions—including navigation, docking, and survey tasks—without a human performing those tasks, qualifying it as Autonomous under the applied definitions.