Sea Tridon

Business BAE Systems Bofors
The maritime adaptation of the ground-based TRIDON system. Sea Tridon combines proven Bofors 40 mm firepower with an integrated electro-optical fire control system, enabling independent operation at sea.
Sea Tridon naval defence system installed on a vessel at sea.
Sea Tridon naval defence system with integrated electro-optical fire control.

Independent by design

Sea Tridon incorporates its own gun-mounted electro-optical fire control system, enabling rapid and accurate engagement without relying on external sensors.

Key features

  • Integrated electro-optical fire control system
  • Independent operation
  • Gun-mounted sensors
  • Integrated gyro stabilization
  • Target intercept calculations
  • 30-round ready-use magazine
  • Compatible with all Bofors 40 mm ammunition
Illustration showing the range of threats countered by Sea Tridon, including drones, loitering munitions, aircraft, anti-ship missiles, naval vessels, attack boats and ground targets.

Built for modern maritime threats

Sea Tridon combines the proven Bofors 40 Mk4 naval gun with an integrated electro-optical fire control system, providing a self-contained solution for detecting, tracking and engaging both air and surface targets.

Designed for naval and non-naval platforms, the system delivers effective protection against modern threats while minimizing integration requirements.

Comparison of engagement coverage between Bofors 40 Mk4 and a competing weapon system.

Better coverage

The extended range of the Sea Tridon provides significantly greater area coverage. As a result, fewer ships are required to protect a harbor, while threats can be engaged at longer distances, reducing risk to friendly forces and critical infrastructure.

Commercial container vessel equipped with the Sea Tridon C containerized defence system during maritime operations.

Sea TridonC

Containerized maritime protection

The Sea TridonC is a containerized version of the Sea Tridon designed to provide civilian and commercial vessels with temporary self-protection in high-risk areas. Optimal for mission modularity or temporary air defense capability.

The modular design enables rapid deployment while minimizing vessel modifications and integration efforts.

: Sea Tridon C containerized naval defence solution.

Sea TridonC features

  • Containerized solution

  • Below-Deck Loading (BDL)

  • Increased ammunition capacity

  • Flexible C2 arrangements

  • Optional surveillance radar integration

Concept illustration of a Bofors 3P programmable ammunition round in flight, highlighting multiple selectable fuze modes and target engagement options for naval operations.

3P programmable all-target ammunition

Any target. Any time.

Sea Tridon and Sea TridonC are fully compatible with the Bofors 3P programmable all-target ammunition.

Unlike conventional ammunition that often requires different rounds for different threats, 3P enables operators to engage aerial, surface and shore-based targets using a single ammunition family.

3P advantages

  • Six programmable fuze modes
  • Effective against air, surface and shore targets
  • Proximity-fuzed engagement capability
  • Simplified logistics
  • Proven operational performance
A man working on GRINDSTONE

GRINDSTONE Effect Simulation Software

Understanding weapon effectiveness is essential when facing modern threats.

GRINDSTONE is BAE Systems Bofors' unique model-based simulation software used to analyse, assess and optimize weapon system performance.

The software allows operators to:

  • Model realistic threat scenarios
  • Evaluate system effectiveness
  • Support tactical development
  • Improve training outcomes
  • Optimize operational planning

The solution is based on decades of development work, extensive live firing campaigns and advanced system analysis.

Frequently Asked Questions

What is Sea Tridon?

Sea Tridon is the maritime adaptation of the ground-based TRIDON system, combining the Bofors 40 Mk4 with an integrated electro-optical fire control system.

What threats can Sea Tridon engage?

The system is designed to engage a broad range of air and surface threats, including drones, missiles, fast attack craft and shore-based targets.

What is Sea TridonC?

Sea TridonC is the containerized version of Sea Tridon, designed to provide deployable protection for vessels requiring a temporary defence capability.

What ammunition does Sea Tridon use?

Sea Tridon is compatible with the complete Bofors 40 mm ammunition family, including the programmable Bofors 3P all-target round.

Can Sea Tridon operate independently?

Yes. The integrated electro-optical fire control system enables independent target detection, tracking and engagement.

Media and press enquiries
Henrik Graff-Hedberg

Director, Communications

BAE Systems Bofors

BAE Systems Platforms & Services