HII to provide TTLR system for US Navy submarines

American defense company HII has been awarded a contract by the Defense Innovation Unit (DIU) to deliver a submarine torpedo tube launch and recovery (TTLR) system designed to autonomously deploy and recover the REMUS unmanned underwater vehicle (UUV) from US Navy submarines.

HII is advancing fully integrated, autonomous maritime capabilities that expand the reach and enhance the effectiveness of the US Navy and its allies.

“This contract award reflects HII’s 25-year leadership in advancing autonomous unmanned maritime platforms and integrating them into submarine operations,” said Duane Fotheringham, president of the Unmanned Systems group in HII’s Mission Technologies division.

“There is no company with more expertise in both the manned and unmanned sides of teamed operations. We look forward to continuing our strong partnership with the U.S. Navy to deliver the innovative solutions our forces urgently need in the subsea domain.”

To date, HII has delivered more than 750 REMUS vehicles to over 30 countries. In June 2025, the US Navy and Woods Hole Oceanographic Institution (WHOI) advanced the ongoing Yellow Moray UUV capability, marking the first forward-deployed torpedo tube launch and recovery of an HII-built REMUS 600 UUV from the USS Delaware (SSN 791), a Virginia-class submarine constructed by HII. 

Delaware and an embarked unmanned undersea vehicle squadron (UUVRON-1) cadre, with WHOI support, conducted overseas operations that included three fully autonomous launch and recovery sorties conducted through the submarine’s torpedo tube without diver assistance.

This demonstration represented a significant operational advancement in the autonomous teaming of manned and unmanned systems for intelligence, surveillance, and reconnaissance (ISR), as well as broader maritime missions.

In July 2025, a joint team from HII, WHOI and the US Navy’s Naval Undersea Warfare Center Division Newport completed the first recovery of the latest generation REMUS 620 into a Virginia-class submarine torpedo tube and shutterway test fixture at Seneca Lake, New York.

During in-water testing, the REMUS 620 demonstrated advanced autonomous navigation and communication capabilities. The vehicle docked with a shock and fire enclosure capsule (SAFECAP) within a submerged torpedo tube test fixture and executed reverse swim-out launch and safe separation procedures, validating critical operational functions for future deployment, according to HII.