Three days aboard the nuclear submarine Tourville

Toulon – 14 July 2026: A television crew spent three days aboard the French nuclear-powered attack submarine Tourville. Journalist Alexandra Lay and cameraman Thomas Donzel accompanied the crew during a submerged voyage. The report offers a rare glimpse into daily life aboard a military vessel, marked by demanding routines, whose missions and movements are generally treated as confidential.

The Tourville belongs to the Suffren class and is the third of a total of six nuclear-powered attack submarines planned under the Barracuda program. The vessel was delivered to the French Navy in November 2024 and officially entered active service on 1 July 2025. Its home port is Toulon, where French attack submarines are stationed in the Mediterranean.

In this case, nuclear propulsion does not mean that the Tourville is used for strategic nuclear deterrence. Unlike French nuclear-powered ballistic missile submarines, it does not carry nuclear ballistic missiles. The reactor primarily provides power for propulsion and enables long submerged voyages without having to surface regularly. However, the actual duration of a mission also depends on supplies, maintenance, and crew fatigue.

The tasks of a submarine of this class include reconnaissance, hunting enemy submarines and surface ships, and protecting a naval group. According to the Ministry of Defense, the Suffren class can also deploy cruise missiles against land targets. For special missions, the Tourville is designed to support equipment and forces of naval commandos.

The report focuses on conditions aboard: limited space, shift work, technical monitoring, and complete isolation from the outside world characterize daily life. On a submarine, the individual operational areas must work closely together, from navigation and energy supply to sonar data analysis. No information was published about a specific route, area of operations, or ongoing assignments.

The Tourville is part of the gradual replacement of the older Rubis class. France intends to modernize its submarine fleet with six Suffren-class vessels. The program is managed by the Direction générale de l’armement and aims to ensure the Marine nationale’s long-term capabilities for deep-water operations in the Mediterranean, the Atlantic, and other maritime areas.

The report now broadcast primarily makes visible what normally remains hidden in military submarine operations: the work of a crew in an enclosed technical environment. Operational details remain confidential for security reasons. Since entering service, the Tourville has represented the new generation of French attack submarines and the ongoing transformation of the naval fleet.