Facts

• Segment: Defense
• Country: United States
• Website: https://hii.com/unmanned-systems/

Profile sections

• Summary
• Market context
• Facts
• Commercial
• Context / Market Position
• Events
• Team
• Relationships
• Context tags
• Customers and deployments
• Sources

Summary

HII Unmanned Systems develops autonomous and unmanned systems for defence and maritime missions. Its portfolio spans unmanned underwater vehicles, autonomy software, mine-countermeasure systems and mission payloads used by naval and government customers.

Market context

HII Unmanned Systems is a scaled maritime autonomy supplier with REMUS vehicles in service across more than 30 navies and long-running Royal Navy adoption. The latest UK support contract reinforces its role as both platform supplier and sustainment provider for operational UUV fleets. HII Unmanned Systems develops and sustains unmanned maritime systems for defense, research, and commercial customers.

Facts

• Website: https://hii.com/unmanned-systems/
• HQ: Pocasset, United States
• Ticker: HII / NYSE
• Segment: Defense

Commercial

4 commercial events; 4 contract awards; latest event 2026-05-15

• 2026-05-15 - Contract award - HII and MetalCraft Marine deliver ROMULUS-25 autonomous USV prototypes - source: hii.com
• 2026-04-23 - Contract award - Royal Navy awards £3 million contract for REMUS UUV support and sustainment - source: bidstats.uk
• 2023-07-13 - Contract award - U.S. Navy awards Lionfish program contract for large UUV development based on REMUS 300 - source: hii.com
• 2022-11-01 - Contract award - HII awarded U.S. Navy contract for REMUS 300 unmanned undersea vehicles - source: hii.com

Unmanned underwater vehicle builder

HII Unmanned Systems builds REMUS unmanned underwater vehicles for defence, research and commercial underwater missions.

• Target environment: Naval operations, underwater survey missions, mine countermeasure areas, research waters and commercial subsea environments.
• Deployment model: UUV platform supply, support and integration for defence, research and commercial maritime customers.
• Customer context: Navies, defence customers, research organizations, subsea operators and maritime autonomy programs.
• Workflow context: Mine countermeasures, ISR, anti-submarine support, underwater survey, search and recovery and autonomous subsea operation.
• Commercial maturity: Established maritime robotics supplier with REMUS systems used across defence, research and commercial operations.
• Market position: Underwater robotics builder supplying mission-ready UUV platforms and support for naval and subsea operations.
• Adoption constraints: Adoption depends on naval procurement, mission reliability, endurance, payload integration, launch-and-recovery methods and support infrastructure.
• Adjacent context: Adjacent context includes UUV builders, mine-countermeasure drones, subsea survey robots and naval autonomy programs.
• Source confidence: high

Events

• 2026-05-15 - Contract Award - 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.
• 2026-04-23 - Contract Award - Royal Navy awards £3 million contract for REMUS UUV support and sustainment - The Royal Navy awarded a contract worth approximately £3 million for support and sustainment of REMUS unmanned…
• 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.
• 2023-07-13 - Contract Award - U.S. Navy awards Lionfish program contract for large UUV development based on REMUS 300 - HII was selected by the U.S. Navy for the Lionfish program to develop and produce large unmanned un…
• 2022-11-01 - Contract Award - HII awarded U.S. Navy contract for REMUS 300 unmanned undersea vehicles - HII was awarded a contract to provide REMUS 300 unmanned underwater vehicles to the U.S. Navy.
• 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.
• 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.

Team

• Duane Fotheringham - President, Unmanned Systems - Robotics-specific leadership row for HII's work in UUVs, USVs and autonomy software, rather than a generic HII corporate CEO row.
• Christopher D. Kastner - President and Chief Executive Officer

Relationships

• REMUS 300 customer - HII received a U.S. Navy contract for REMUS 300 unmanned underwater vehicles.
• MetalCraft Marine - ROMULUS-25 USV prototype partner - HII and MetalCraft Marine partnered on ROMULUS-25 autonomous USV prototypes for the U.S. Marine Corps.
• customer - U.S. Navy — REMUS 300 and Lionfish / large UUV programs (HII press)
• customer - Royal Navy — REMUS UUV support and sustainment (tender/award ref.)
• deployment_partner - NATO Baltic Sea MCM exercise — REMUS 100 (HII press)
• USV supplier - HII and MetalCraft Marine delivered and sea-tested two ROMULUS-25 autonomous USV prototypes for the U.S. Marine Corps under a DIU contract.
• Royal Navy - Royal Navy REMUS support customer - The Royal Navy awarded HII a support and sustainment contract for REMUS UUVs.

Context tags

• Defence customers - Customer Environment
• Marine surface operations - Customer Environment
• Maritime unmanned systems builder - Peer Group
• Maritime unmanned operations - Workflow
• Maritime unmanned OEM - Stack Layer

Customers and deployments

• Delivered Usv Prototype Count - 2 ROMULUS-25 prototypes delivered and sea-tested - 2026-05-15 - U.S. Marine Corps - autonomous surface vessel prototypes - HII and MetalCraft Marine delivered and sea-tested two ROMULUS-2…
• Deployment Status - approximately £3 million REMUS support contract - 2026-04-23 - Royal Navy - United Kingdom - The Royal Navy awarded HII a roughly £3 million support and sustainment contract for REMUS unmanned underw…
• Commercial Rollout - REMUS 300 UUV contract - 2022-11-01 - U.S. Navy - United States - HII received a U.S. Navy contract to provide REMUS 300 unmanned underwater vehicles for mine countermeasures and expeditionary missi…
• Field Exercise Deployment - REMUS 100 UUVs deployed in NATO Baltic exercise - 2022-06-21 - NATO exercise participants - underwater mine countermeasures - REMUS 100 UUVs supported a NATO mine-countermeasures exercise in…