Medusa & Hammerhead to Modernize Underwater Mining

Medusa & Hammerhead to Modernize Underwater Mining
Sea mines, like this World War II mine destroyed by Explosive Ordnance Disposal teams in the Baltic Sea in 2014, are extremely dangerous to submarines and surface ships. (Credit: US Navy, Mass Communication 1st Class David R. Krigbaum/Released)
General Dynamics Mission Systems has been selected by the US Navy to develop the next-generation Mining Expendable Delivery Unmanned Submarine Asset (MEDUSA) system.
Captain Edward LundquistUS Navy (Retired)
Captain Edward Lundquist
US Navy (Retired)

According to a Navy press release, “It is a cutting-edge unmanned system designed to meet the Navy’s requirement for an advanced maritime mining system.”
MEDUSA is a medium-class unmanned underwater vehicle (UUV) with offensive mining capabilities. The system can be deployed by launching from submarine torpedo tubes, or, potentially future UUVs, and can deliver its mine payload accurately and clandestinely to positions far from the launch location or platform. Once deployed, it is designed to be an expendable system.

“This innovative mining system enhances our capabilities, allowing us to stay one step ahead in a rapidly changing environment,” said Rear. Adm. Kevin Smith, Pro- gram Executive Officer, Unmanned and Small Combatants. “By empowering our warfighters with cutting-edge unmanned technology like MEDUSA, we’re ensuring they have the tools they need to thrive in complex situations and protect our interests at sea.”

The initial research and development con- tract is for $15.9 million for the design, fabrication, and testing of the MEDUSA prototypes and associated risk reduction activities. The contract provides options for prototype production and support work through 2032 with a total contract value of up to $58.1 million.

“The award of the MEDUSA contract rep- resents our commitment to advancing unmanned technology and integrating it into Navy operations,” said Capt. Matthew Lewis, program manager of the Unmanned Maritime Systems program office. “Innovation is critical to our national security and

directly contributes to the readiness of our fleet. This contract enables us to invest in future operational capabilities and to push the boundaries of what we thought possible.”

LEVERAGING EXPERTISE

The experience and capabilities of the General Dynamics Mission Systems autonomous maritime platforms are well suited for the MEDUSA program.
“By leveraging our mature Bluefin Robotics UUV platforms, submarine platform integration experience, and our expertise in launching various torpedoes and payloads from submarines, General Dynamics Mission Systems will provide exceptional capability, military utility, and mission reliability to MEDUSA operators,” said Dr. Laura Hooks, Vice President and General Manager of the Maritime and Strategic Systems business at General Dynamics Mission Systems.

General Dynamics Mission Systems assembled a world-class team to support the Navy’s MEDUSA program, including General Dynamics Electric Boat, General Dynamics Applied Physical Sciences and MIKEL.

“With such an aggressive schedule, each of our partners will have an essential role in ensuring we can deliver on our commitments to the US Navy,” said Paul Dalton, Vice President for Autonomous Maritime Platforms at General Dynamics Mission Systems.

MEDUSA development will occur primarily at General Dynamics Mission Systems’ Quincy, Massachusetts facility, which has become a focal point for rapid prototyping and development of autonomous maritime systems in recent years. The company also established the UUV Center of Excellence (COE) at its Taunton, Massachusetts, manufacturing facility.

“Our initial collaboration with the US Navy on MEDUSA has been very promising and we are poised to move quickly on this urgent operational need,” said Michael Guay, Director of Growth for Autonomous Maritime Platforms at General Dynamics Mission Systems.
MEDUSA is based on General Dynamics Mission Systems’ flagship Bluefin-21 UUV, which has been employed as a reliable platform for supporting fast-moving research and development programs.

Examples include the Naval Research Lab- oratory’s Reliant and Black Pearl with the Skyfish downward-looking payload and the NATO Centre for Maritime Research and Experimentation’s Black Cat and MUS- CLE (Minehunting UUV for Shallow Water Covert Littoral Expeditions) experimentation platforms.

BY EMPOWERING OUR WARFIGHTERS WITH CUTTING- EDGE UNMANNED TECHNOLOGY LIKE MEDUSA, WE’RE ENSURING THEY HAVE THE TOOLS THEY NEED TO THRIVE IN COMPLEX SITUATIONS AND PROTECT OUR INTERESTS AT SEA. –Rear Adm. Kevin Smith, US Navy, Program Executive Officer, Unmanned and Small Combatants

HAMMERHEAD

The Hammerhead mine deploys a MK 54 torpedo, like this one being loaded aboard USS Spruance (DDG 111), when it senses a target. (Credit: US Navy by Mass Communication Specialist Seaman Joey Sitter)
The Hammerhead mine deploys a MK 54 torpedo, like this one being loaded aboard USS Spruance (DDG 111), when it senses a target. (Credit: US Navy by Mass Communication Specialist Seaman Joey Sitter)

General Dynamics Mission Systems has seen success in the mine warfare market. The team also produces the Hammerhead mine, which the Navy describes as an “Encapsulated Effector.” Hammerhead is “a moored-torpedo variant mine system designed to be delivered by unmanned underwater vehicles.”

Hammerhead is the successor to a similar concept employed 50 years ago. The “Encapsulated Torpedo” or CAPTOR con- cept was tested back in the 1970s and was eventually deployed by aircraft and submarines. CAPTOR was essentially a bot- tom-moored influence mine that, when pre- set conditions were met, would activate a MK 54 torpedo, which would then proceed to detonate near the target.

Like MEDUSA, the Hammerhead system is also fully autonomous. Once in place, Hammerhead waits until its sensors confirm pre-set specific target signatures before releasing its torpedo—in this case, the MK54 torpedo, a successor to the MK 46. The torpedo would then actively pursue the target and attack.

According to a December 24, 2024 report from the Congressional Research Service, the Navy plans on deploying Hammer- head with Extra-Large UUVs (XLUUVs) as a means of placing the mines. “The Navy wants to use XLUUVs to, among other things, covertly deploy the Hammerhead mine, a planned mine that would be tethered to the seabed and armed with an anti- submarine torpedo, broadly like the Navy’s Cold War-era CAPTOR mine.

“Our expertise in integrating undersea pay- loads and sensors is being applied to this critical maritime mine capability. The Ham- merhead program will ensure that threats to the fleet will be neutralized safely and effectively,” said Dalton.

The Hammerhead work will be performed in Taunton and is expected to be completed by June 2026.

“We’ve repurposed manufacturing space in our Taunton, Massachusetts, facility to handle the larger scale production of our systems, optimizing our waterfront operations in Quincy as an accelerator for development and prototyping of new UUVs and other novel autonomous maritime systems,” added Guay.

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