F21 Heavyweight Torpedo: Naval Group’s Advanced Undersea Weapon and Its Role in Next-Generation Submarine Warfare

The undersea domain remains the most strategically consequential — and least publicly visible — dimension of naval warfare. In this environment, the F21 heavyweight torpedo represents Naval Group’s contribution to French and export submarine combat capability. Integrated into every French nuclear and diesel-electric submarine, including the new Barracuda-class SSNs, the F21 combines extended range with multi-mode guidance to engage both submarine and surface targets at ranges that exceed the engagement envelope of most comparable systems.

Technical Specifications

Comparison with Peer Torpedoes

Editorial Assessment

F21 ensures that Barracuda’s MDCN land-attack capability is not bought at the cost of undersea combat effectiveness. A submarine that can strike land targets with cruise missiles but cannot defend against or prosecute enemy submarines is a one-dimensional platform. F21’s integration into Barracuda makes it a credible full-spectrum platform — land attack, surface warfare, and undersea warfare from the same hull.