Royal Navy launches missile from MADFOX USV in REPMUS exercise


Published on 10/15/2021 – Last Updated on 10/15/2021 by OTC

During NATO’s largest autonomous war games, REPMUS 2021, the Royal Navy launched a missile from its autonomous boat MADFOX.

NavyX, the Royal Navy’s innovation experts, dispatched uncrewed technology to Portugal for the annual experimental exercise. The two-week exercise aims to evaluate NATO system integration and investigate existing and potential military uses for autonomy.

The MADFOX crewless boat, which has been undergoing trials all year, was at the heart of the Royal Navy’s contribution. During its first foreign deployment, the boat was put through its most difficult test to date: being part of a surveillance training operation that culminated with a missile launch.


For the trial, a Puma drone launched by USNS Carson City sent information on a potential target – in this example, a simulated target of a Spanish crewless boat – to a land-based control center. When the information was obtained, it was forwarded to the Royal Navy’s MADFOX warship, and the missile was launched.

Commander Antony Crabb, NavyX Experimentation Team Leader, said: “The system launch from MADFOX was the UK first, demonstrating the potential of uncrewed surface vessels for lethal and other payloads; crucially, the whole serial was commanded, enabled and facilitated using the information provided by uncrewed systems.

“It is a significant step for UK/US interoperability and interchangeability.”

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Puma drone launched by USNS Carson City

Later in the exercise, Royal Navy technology-supported night-time amphibious operations. It saw MADFOX observe a ‘target’, undetected, and provide live imagery using its onboard cameras.

As Portuguese Marines stormed ashore, aerial drones provided further surveillance, sending imagery to ruggedised tablets within the assault forces. Personnel in the Maritime Operations Centre were able to make an assessment of the target defences and enemy strength before ordering an attack.

About REPMUS exercise:

Exercise REP(MUS) 21 is an annual exercise jointly organised by the Portuguese Navy, the University of Porto, NATO’s Centre for Maritime Research and Experimentation (CMRE) and the NATO Maritime Unmanned Systems Initiative. The exercise gives Allies and partners a chance to field and evaluate new maritime technologies. REP(MUS) stands for ‘Robotic Experimentation and Prototyping augmented by Maritime Unmanned Systems’.

The exercise was designed to show how dismounted Command and Control systems could extend situational awareness provided by uncrewed systems to small distributed teams. The tablets also enabled the Marines to request missions from the uncrewed systems connected to the UK MAPLE mission planning system.

More than 900 personnel, 70 autonomous uncrewed systems and 11 navy vessels took part in REPMUS.

Check out Naval Library App to find out more about the specifications of the MADFOX USV.

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