BAE Systems has unveiled Sea Tridon, a new modular 40mm naval gun system, at Euronaval 2026, expanding its portfolio of maritime protection solutions. Developed by BAE Systems Bofors, the system forms part of a scalable family designed to help naval and maritime operators address air, surface and shore-based threats while adapting equipment configurations to different vessels and operational requirements.The family builds on the combat-proven Bofors 40mm gun and programmable 3P ammunition. It comprises Sea Tridon, the containerized Sea TridonC, Sea Trinity and the Bofors 40 Mk4 Naval Gun. By offering different levels of sensor integration, fire-control capability and deployment flexibility, BAE Systems aims to provide operators with a choice of protection capabilities while maintaining commonality in training, logistics and support.

Lena Gillström, President of BAE Systems Bofors, said the changing maritime threat environment was creating greater demand for flexible and effective protection. She explained that Sea Tridon allows navies and maritime operators to select a capability level suited to their operational needs, combining a common platform with proven technology and advanced programmable ammunition.

Sea Tridon is a maritime adaptation of the Tridon concept, pairing the Bofors 40mm gun with an integrated electro-optical fire-control system. This configuration is intended to provide greater operational independence and simplify integration onto a host platform. Within the wider family, it offers an option for operators seeking a gun system with its own integrated fire-control capability.

The Sea TridonC takes the same approach into a containerized configuration, supporting rapid installation and deployment. It is designed for military, government and commercial vessels requiring temporary or mission-specific self-protection. Its deployment flexibility gives operators an alternative configuration when protection requirements relate to a particular mission, rather than a permanent installation.

Sea Trinity represents the most advanced member of the family. It combines the Bofors 40mm gun and programmable 3P ammunition with integrated radar fire control to form a complete close-in weapon system. Designed to counter missiles, drones and other high-speed threats, it provides a further capability level within the modular range.

The Bofors 40 Mk4 Naval Gun completes the four-system offering. Described as compact and lightweight, it is designed for integration with ship combat systems and provides protection against air and surface threats. Its inclusion gives operators a choice alongside the configurations incorporating electro-optical or radar fire control.

Common to all four solutions is Bofors 3P programmable ammunition. Its fuze can be configured immediately before firing to optimize effects against different target types. Six programmable fuze modes allow a single ammunition family to engage air, surface and shore-based threats, supporting the commonality underpinning the wider product range.

Taken together, the four configurations give maritime operators options ranging from a naval gun integrated with ship combat systems to containerized protection and a complete radar-directed close-in weapon system. The shared gun and ammunition foundation connects these options with common training, logistics and support requirements.

Sea Tridon is being displayed at BAE Systems’ Euronaval 2026 stand, E30, where visitors can explore the new family and its intended contribution to current and future naval protection requirements.