HII has signed a multi-year agreement with Japan’s Hitachi Ltd. to supply more than a dozen REMUS 300 small uncrewed undersea vehicles (SUUVs), the company announced from its Pocasset, Massachusetts facility on June 30.
The order expands HII’s international customer base for the REMUS 300, a modular SUUV platform developed for adaptable, multi-mission use. The same vehicle serves as the foundation for the U.S. Navy’s Lionfish program.
Under the agreement, the REMUS 300s will be delivered over a period of several years. The purchase reflects ongoing cooperation between the U.S. and Japan in maritime defense technology, with the platform already in operation with various international partners.
According to HII, the REMUS 300’s open-architecture design supports a range of payloads and mission types, including mine countermeasures. The system is designed for interoperability with allied naval forces and can be used independently or alongside crewed platforms.
“This order marks an important step for our commercial REMUS 300 line,” said Duane Fotheringham, who leads HII’s Uncrewed Systems business under its Mission Technologies division.
HII reports that it has delivered over 700 REMUS units to more than 30 countries, including 14 NATO members. The company also states that over 90% of the vehicles supplied over the last two decades are still in active service.
The REMUS line is intended to extend the range and flexibility of naval operations while reducing exposure risks for personnel. The modular structure of the system allows future technology upgrades and mission-specific configurations.