British BAE Systems Unveils Sea Tridon Naval Gun Family to Protect Ships From Drones and Missiles

BAE Systems unveiled its Sea Tridon family of 40mm naval self-protection systems at Euronaval on November 3, 2026, offering four configurations built around Bofors L/70 guns and programmable 3P ammunition. Sea Tridon combines the gun with electro-optical fire control, while Sea Tridon C provides a containerized option for temporary or mission-specific installations. Sea Trinity adds integrated radar fire control for close-in defence against missiles, drones and other fast threats, alongside the existing Bofors 40 Mk4 naval mount. The family shares ammunition and support arrangements, although the announcement did not identify a new customer or procurement contract.