U.S. Navy funds a robotic submarine built to secretly lay mines
By
Colton Jones
Jul 8, 2026
Modified date: Jul 8, 2026
Photo by General Dynamics
Key Points
The U.S. Navy awarded General Dynamics Mission Systems a $13.97 million contract modification on July 6, 2026, for MEDUSA prototype development.
Work will be performed in Quincy and Taunton, Massachusetts, with an expected completion date of July 2028.
A torpedo-tube-launched robot built to secretly plant mines from American submarines just got another $14 million push toward becoming operational, as the U.S. Navy exercises new contract options with General Dynamics Mission Systems to keep developing the system.
The Navy Sea Systems Command awarded the Massachusetts-based defense contractor a modification worth roughly $13.97 million on July 6, adding prototype systems, software development, shore-based support equipment, and engineering services to an existing agreement covering the Mining Expendable Delivery Unmanned Submarine Asset, a mouthful the Navy shortens to MEDUSA.
MEDUSA is designed to solve a problem that has quietly worried Navy planners for years: how do you lay naval mines in contested or heavily monitored waters without ever putting a crewed vessel at risk. The system works as an expendable unmanned underwater vehicle, a robotic submarine roughly the size of a torpedo, that launches directly from a submarine’s own torpedo tube and then travels independently to deliver its mine payload far from where the launching submarine actually sits, according to General Dynamics. Because the vehicle is expendable, meaning it is not designed to be recovered and reused after completing its mission, the submarine that fires it can move away from the area immediately rather than lingering to retrieve the device, sharply reducing the window in which the launching vessel itself could be detected or targeted.
https://defence-blog.com/u-s-navy-funds-a-robotic-submarine-built-to-secretly-lay-mines/
