BAE Systems Launches Innovative Sea Tridon Naval Gun Series at Euronaval 2026

At the Euronaval defense show in Paris, BAE Systems launched a new series of naval guns called Sea Tridon, marking a significant addition to its maritime armament offerings ¹²³. This unveiling comes as part of the company’s ongoing efforts to enhance naval capabilities and provide innovative solutions to its global customer base.

According to reports, the Sea Tridon series comprises three main variants: Sea Tridon, Sea TridonC, and Sea Trinity. Each variant showcases unique features tailored to specific operational needs. For instance, Sea Tridon integrates a Bofors 40mm gun with an advanced electro-optical fire-control system, enhancing its precision and effectiveness in combat scenarios ¹.

Sea TridonC stands out for its containerized design, allowing for rapid deployment and potential abandonment if necessary. This makes it particularly suitable for operations where mobility and adaptability are crucial ¹. Meanwhile, Sea Trinity, described as the most advanced variant, combines the Bofors 40mm gun with an integrated fire control radar, providing superior performance against various threats such as anti-ship missiles and drones ³.

Discussions are currently underway with several navies regarding the integration of Sea Tridon guns on unmanned systems, highlighting the potential for these weapons to play a pivotal role in future naval warfare ¹. Additionally, the 3P ammunition used in these systems offers versatility through its ability to be programmed for different fuze modes, enhancing tactical flexibility ².

The Bofors 40 Mk4 Naval Gun, which forms the core of the Sea Tridon series, boasts impressive specifications. It has a rate of fire of 300 rounds per minute and a maximum range of 12,500 meters, making it highly effective in both close-range engagements and long-distance strikes ³.

However, there is some discrepancy regarding the exact composition of the Sea Tridon series. While sources report three main variants, there is a suggestion that the series might include a fourth variant, the Bofors 40 Mk4 Naval Gun itself, though this is contested ³.

Current customers for BAE's Mk4 naval gun include the UK's Royal Navy and the Royal Netherlands Navy, alongside the Belgian Navy, which has selected the gun for its mine countermeasure vessels ¹. These partnerships underscore the trust placed in BAE Systems’ technology and its readiness to meet diverse naval requirements.

What we know

• - BAE Systems launched the Sea Tridon series of naval guns at Euronaval 2026 ¹²³
• - The series includes three main variants: Sea Tridon, Sea TridonC, and Sea Trinity ¹²
• - Sea Tridon features a Bofors 40mm gun with an integrated electro-optical fire-control system ¹
• - Sea TridonC is designed for swift deployment and potential abandonment ¹
• - Sea Trinity is equipped with a Bofors 40mm gun and integrated fire control radar ¹
• - Discussions are ongoing with several navies about integrating Sea Tridon guns on unmanned systems ¹
• - The 3P ammunition used in these systems can be programmed for different fuze modes ²
• - Sea Trinity is designed to counter anti-ship missiles, drones, and other high-speed threats ³
• - All four systems use Bofors 40mm ammunition, including the 3P programmable round with six fuze modes ³
• - The Bofors 40 Mk4 Naval Gun has a rate of fire of 300 rounds per minute and a maximum range of 12,500 meters ³
• - Current customers for BAE's Mk4 naval gun include the UK's Royal Navy and the Royal Netherlands Navy ¹
• - The Royal Netherlands Navy and Belgian Navy have chosen the naval gun for their mine countermeasure vessels ¹

What remains unclear

• - Whether the Sea Tridon series includes four main variants, including the Bofors 40 Mk4 Naval Gun, or just three ³