HII Unmanned Systems

• REMUS 130
• REMUS 300

  REMUS

• REMUS 6000
• REMUS 620

Output & shipments

• Deliveries

  2026-05-15 - HII and MetalCraft Marine delivered and sea-tested two ROMULUS-25 autonomous USV prototypes for the U.S. Marine Corps under a DIU contract. - ROMULUS-25 - ROMULUS-25 prototype delivery

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Orders & commitments

• Order / commitment

  2022-11-01 - HII received a U.S. Navy contract to provide REMUS 300 unmanned underwater vehicles for mine countermeasures and expeditionary missions. - vehicle order

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• Operating use

  2026-04-23 - The Royal Navy awarded HII a roughly £3 million support and sustainment contract for REMUS unmanned underwater vehicles. - support contract value

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• Operating use

  2022-06-21 - REMUS 100 UUVs supported a NATO mine-countermeasures exercise in the Baltic Sea for seabed mapping and mine-hunting. - field exercise deployment - Baltic Sea mine-countermeasures exercise

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Supply chain relationships

• Kraken Robotics

  Inbound - robotics sensors - Kraken supplies AquaPix MINSAS sonar as an OEM payload for HII REMUS 620 UUVs

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• MetalCraft Marine

  Inbound - Manufacturing - MetalCraft Marine supplies ROMULUS-25 vessel design and manufacturing for HII ROMULUS autonomous USV programme

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• Duane Fotheringham - President, Unmanned Systems

Events

• 2026-09-22 - Facility Opening - HII opens 10,000-square-foot Pocasset unmanned-systems expansion

  The site builds and integrates REMUS underwater vehicles and ROMULUS unmanned surface vessels. Added capacity supports Lionfish small UUV production and the REMUS 620 programme. HII says Odyssey autonomy integration and simulation work will also use the expanded campus.

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• 2026-08-11 - Demonstration - DIU recognizes successful completion of HII and MetalCraft ROMULUS-25 prototype programme

  MetalCraft Marine supplied the 25-foot Watcher hull while HII integrated its Odyssey autonomous-control software, creating the ROMULUS-25 configuration evaluated through the programme. The two prototypes were delivered in December 2025 and subsequently demonstrated autonomous mission behaviours during at-sea testing for the U.S. Marine Corps. Successful prototype completion allows the Department of War to consider follow-on production through an Other Transaction Agreement without reopening a conventional competition.

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• 2026-07-06 - Contract Award - U.S. Navy exercises option-year production contract for HII Lionfish SUUV

  HII received an option-year production contract for the U.S. Navy Lionfish small unmanned undersea vehicle, a REMUS 300-based system for undersea missions. The Lionfish program can scale to up to 200 vehicles under a five-year structure. HII had completed the 42nd Lionfish vehicle by the end of 2025.

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• 2026-07-06 - Production Milestone - HII adds Halimar Shipyard to ROMULUS USV production network

  Halimar will construct complete ROMULUS 151 unmanned surface vessels. The partnership expands HII's Gulf Coast manufacturing footprint. Five ROMULUS 151 vessels were already under construction at Breaux Brothers.

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• 2026-05-15 - Production Milestone - HII and MetalCraft Marine deliver ROMULUS-25 autonomous USV prototypes

  HII said the two ROMULUS-25 autonomous USVs were delivered in December 2025 and supported sea testing. The vessels were awarded under a Defense Innovation Unit contract for smaller form-factor autonomous boat prototypes for the U.S. Marine Corps. HII said ROMULUS-25 is powered by its Odyssey autonomy suite and is designed for up to 1,000 pounds of payload and up to 1,000 nautical miles of range.

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• 2025-11-18 - Contract Award - HII wins £3.04 million UK REMUS fleet-support contract

  The contract covers project management, technical support, repairs, maintenance and training. The £3,044,857.50 award excludes VAT and has no options. The agreement was concluded on November 18, 2025, following a competitive procedure with negotiation.

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• 2026-04-24 - Contract Award - UK Ministry of Defence awards HII follow-on REMUS fleet support contract

  The £3.04 million award covers project management, technical support, repairs, training and maintenance for both fleets. The contract was concluded on 18 November 2025 and the award notice was published on 24 April 2026. The Ministry of Defence’s SALMO team identified HII Unmanned Systems as the sole awarded contractor.

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• 2025-05-15 - Market Signal - REMUS UUV family reaches adoption across more than 30 navies worldwide

  HII said the REMUS unmanned underwater vehicle family is used by more than 30 navies globally. The systems have been deployed across mine countermeasures, survey, and inspection missions. The milestone reflects long-term operational adoption of REMUS platforms.

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• 2023-11-02 - Commercial Order - Kraken receives $1 million sonar order for HII REMUS 620

  The order was valued at $1 million and scheduled for fulfillment in 2024. The REMUS 620 systems were intended for NOAA-led teams mapping deep-water corals and other sensitive habitats. The MINSAS payload can be configured with 60 cm or 120 cm sonar arrays on the REMUS 620.

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• 2023-10-11 - Contract Award - HII wins U.S. Navy Lionfish small-UUV contract

  The full programme could exceed $347 million if its options are exercised. The contract includes engineering services, vehicle support and auxiliary equipment. Lionfish uses a portable, open-architecture design with interchangeable payloads.

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• 2022-06-21 - Deployment - REMUS 100 UUVs deployed in NATO Baltic Sea mine countermeasures exercise

  REMUS 100 unmanned underwater vehicles were deployed during a NATO mine countermeasures exercise in the Baltic Sea. The systems supported seabed mapping and mine detection operations. The deployment demonstrated interoperability across allied naval forces.

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• 2021-09-21 - Product Launch - HII introduces REMUS 620 unmanned undersea vehicle for deepwater missions

  HII introduced the REMUS 620 unmanned underwater vehicle for deepwater operations. The system is designed for depths up to 6,000 meters. REMUS 620 targets missions including deep-ocean survey, research, and subsea inspection.

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Relationships

• NATO

  Deployment Partner - NATO Baltic Sea MCM exercise — REMUS 100 (HII press)

• Hydroid

  Acquired Company - Huntington Ingalls acquired Hydroid and combined it with its unmanned-systems operation.

• U.S. Navy

  Unmanned Undersea Vehicle Customer - The U.S. Navy exercised a production option for HII’s Lionfish REMUS 300-based undersea vehicles.

• UK Ministry of Defence / SALMO

  Supplier - The UK Ministry of Defence awarded HII a £3.04 million contract to support REMUS 100 and 300 UUVs.

• Halimar Shipyard

  Partner - Halimar joined HII's ROMULUS production network to build complete ROMULUS 151 vessels.

• MetalCraft Marine

  Romulus 25 Usv Prototype Partner - HII and MetalCraft Marine partnered on ROMULUS-25 autonomous USV prototypes for the U.S. Marine Corps.

Comparable profiles

• Thunder Tiger

  stack adjacency - Maritime Unmanned Oem

• Birdon Group

  stack adjacency - Maritime Unmanned Oem

• SubSea Craft

  stack adjacency - Maritime Unmanned Systems Builder

• MARTAC

  stack adjacency - Maritime Unmanned Systems Builder

• ACUA Ocean

  stack adjacency - Maritime Unmanned Systems Builder

• Zelim

  stack adjacency - Maritime Unmanned Systems Builder

• HonuWorx

  stack adjacency - Maritime Unmanned Systems Builder

Context tags

• Defence customers - Customer Environment
• Marine surface operations - Customer Environment
• Uncrewed maritime-system layer - Stack Layer
• Maritime unmanned operations - Workflow
• Maritime unmanned OEM - Stack Layer

• U.S. Navy exercises option-year production contract for HII Lionfish SUUV

  2026-07-06 · Order / contract · HII received an option-year production contract for the U.S. Navy Lionfish small unmanned undersea vehicle, a REMUS 300-based system for undersea missions.

  Source
• HII and MetalCraft Marine deliver ROMULUS-25 autonomous USV prototypes

  2026-05-15 · Order / contract · HII and MetalCraft Marine delivered and sea-tested two ROMULUS-25 autonomous unmanned surface vessel prototypes for the U.S. Marine Corps under a DIU contract.

  Source
• UK Ministry of Defence awards HII follow-on REMUS fleet support contract

  2026-04-24 · Order / contract · The UK Ministry of Defence awarded HII Unmanned Systems follow-on support and sustainment work for Royal Navy REMUS 100 and REMUS 300 vehicles.

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• HII wins £3.04 million UK REMUS fleet-support contract

  2025-11-18 · Order / contract · The UK Ministry of Defence awarded HII Unmanned Systems a follow-on support contract for its REMUS 100 and 300 fleets.

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• Kraken receives $1 million sonar order for HII REMUS 620

  2023-11-02 · Order / contract · Kraken Robotics received an initial order for its AquaPix MINSAS synthetic-aperture sonar system for HII’s REMUS 620 uncrewed underwater vehicle.

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• HII wins U.S. Navy Lionfish small-UUV contract

  2023-10-11 · Order / contract · HII received an initial order for nine REMUS 300-based Lionfish vehicles, with options for up to 200 over five years.

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