BAE Systems unveils Sea Tridon container mounted naval guns
The modular 40 mm defense system allows merchant and patrol vessels to deploy automated anti drone artillery without structural rebuilds.
BAE Systems presented its modular Sea Tridon naval gun family at the Euronaval 2026 exhibition in Paris to counter aerial drones and maritime swarms. The defense innovation adapts rapid-fire cannons for auxiliary vessels, patrol boats, and commercial cargo ships. By packaging automated artillery into standard freight units, operators can install defensive firepower without rebuilding their vessels.
Adapting a century of artillery design for loitering munitions
The hardware relies on the Bofors 40 mm L/70 rapid-fire cannon, an architecture originally developed during the 1930s, as reported by New Atlas. Over decades of technological innovation, engineers modernized the platform with pre-fragmented programmable ammunition, proximity fuses, and digital fire-control interfaces. In 2023, BAE Systems adapted these naval guns for land duty to defeat loitering munitions and small unmanned aircraft. The Sea Tridon family returns the concept to water, using advanced robotics and automated anti-drone modifications to protect ships against swarm tactics.
“The maritime threat landscape is evolving rapidly, creating a growing need for flexible and effective protection solutions.”
— Lena Gillström, President of BAE Systems Bofors
Four modular configurations from integrated combat to container turrets
The Sea Tridon series includes four specific configurations designed for different operational needs, according to New Atlas. The standard Bofors 40 Mk 4 Naval Gun operates as a lightweight automated cannon that plugs directly into a warship's central combat management system. A second variant, the basic Sea Tridon, incorporates its own electro-optical targeting unit, allowing installation on vessels lacking an internal combat network. For standalone air defense, the Sea Trinity acts as a self-contained Close-In Weapon System equipped with its own radar tracking module.
Containerized defense and commercial shipping rules
The most unusual model in the family is the Sea Tridon C, which mounts an automated cannon turret directly on top of a standard freight container, as detailed by New Atlas. This invention enables rapid installation on auxiliary craft, patrol cutters, and merchant marine vessels navigating high-risk waters such as the Gulf of Aden or the Straits of Malacca. International maritime law restricts arming private commercial vessels; deployment of the containerized intellectual property therefore requires official naval or coast guard personnel aboard to operate the firing controls. BAE Systems Bofors president Lena Gillström noted that the modular concept allows operators to match defensive tiers to current operational needs while maintaining a shared munition platform.
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