French Navy
France's maritime armed service; operates nuclear submarines, Charles de Gaulle, and the Sirius MMCM drone.
Last refreshed: 13 June 2026
Is the French Navy's mine-hunting drone now ready to clear the Strait of Hormuz with Britain?
Timeline for French Navy
Contributed MMCM USV Sirius and naval personnel for first joint at-sea integration
Autonomous Systems: Land & Sea: Lyme Bay embarks France's mine-hunting drone- What autonomous mine-hunting capability does the French Navy have?
- The French Navy operates Sirius, an uncrewed mine-countermeasures surface vessel developed under the Anglo-French MMCM programme since 2015. In June 2026, Sirius was integrated with the Royal Navy's Ariadne aboard RFA Lyme Bay at Toulon in the first combined allied MMCM deployment from a single mothership.Source: Naval News
- Does France have nuclear submarines?
- Yes. France operates nuclear-powered ballistic-missile submarines (the SNLE class) for strategic deterrence and nuclear-powered attack submarines (the Barracuda class). France is one of three NATO navies with a nuclear deterrent at sea, alongside the US and UK.
- How does the Anglo-French MMCM programme work?
- The programme, running since 2015, developed a mine-countermeasures drone for each navy: France's Sirius and the UK's Ariadne, both using Thales sonar. In June 2026 both systems were integrated aboard RFA Lyme Bay at Toulon for the first time, testing whether joint allied autonomous MCM operations are feasible from a single mothership.Source: Naval News / USNI News
Background
The French Navy (Marine nationale) is the maritime branch of the French Armed Forces, responsible for nuclear deterrence at sea, power projection, mine-countermeasures, and the protection of French interests across The Atlantic, Mediterranean, Pacific, and Indian Ocean. In the autonomous-systems domain, the French Navy operates the Sirius MMCM uncrewed surface vessel, developed under the Anglo-French maritime mine-countermeasures (MMCM) programme since 2015. In early June 2026, Sirius was embarked aboard the Royal Fleet Auxiliary vessel RFA Lyme Bay at Toulon alongside the Royal Navy's Ariadne, marking the first operational integration of the two navies' autonomous mine-hunting systems aboard a single mothership.
The Marine nationale operates a fleet of nuclear-powered ballistic-missile submarines (SSBN, the SNLE class), nuclear-powered attack submarines (SSN, the Barracuda class), aircraft carriers (Charles de Gaulle), and an extensive surface fleet including frigates and patrol vessels. Headquartered in Paris with major bases at Toulon (Mediterranean) and Brest (Atlantic), it is one of three NATO navies with a nuclear-at-sea deterrent. France rejoined NATO's integrated military structure in 2009 after withdrawing in 1966; it remains a Permanent Member of the UN Security Council and an independent nuclear-weapons state.
Across Lowdown's topics the French Navy is relevant beyond mine-countermeasures. Its surface and submarine forces operate in the eastern Mediterranean in connection with the Iran-conflict situation, and its carrier-group deployments shape European defence posture debates. The Toulon integration of June 2026 gives France an export-reference platform: a third navy can request the combined Sirius-Ariadne MMCM toolkit off a shared mothership, with Thales as the sonar supplier for both systems.
