Sea Trinity. Fully autonomous with integrated radar.
Key features
- Fully autonomous
- Radar tracker provides all weather capability
- Integrated surveillance radar for target detection and tracker/gun designation
- Modified cupola to withstand additional sensor weight
- Compatible with all Bofors 40 mm ammunition, including 3P
With integrated sensors, fire control and weapon in a single mount, Sea Trinity can independently detect, track and engage threats, while also integrating into a ship’s combat system when required.
A wide range of threats
All Bofors 40 Mk4 based systems, when combined with 3P all target ammunition, provide superior close in defense against both air and surface threats. Sea Trinity is designed to counter, for example:
- UAS
- Anti ship missiles
- Aircraft
- Loitering ammunition
- Ground units
- Naval ships
- Attack boats
Better coverage
The extended range of the Bofors 40 Mk4 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.
3P programmable all-target ammunition
Any target. Any time.
Sea Trinity is 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
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 Trinity?
Sea Trinity is a complete, advanced 40 mm Close-In Weapon System (CIWS) built around the Bofors 40 Mk4. It is designed to meet or exceed the capabilities of today’s leading naval self-defense systems, providing fully autonomous close-in protection for naval platforms.
How autonomous is Sea Trinity?
Sea Trinity is a fully autonomous system with its own surveillance radar, radar tracker and fire-control functions integrated into the mount. It can detect, track and engage targets independently, while still being able to interface with a ship’s combat management system when required.
Which threats can Sea Trinity engage?
Combined with Bofors 40 mm 3P ammunition, Sea Trinity provides close-in defense against a wide range of air and surface threats, including:
- Unmanned aerial systems (UAS)
- Anti-ship missiles
- Aircraft
- Loitering munitions
- Ground units
- Naval ships
- Attack boats
What sensors does Sea Trinity use?
Sea Trinity includes an integrated surveillance radar for target detection and a dedicated radar tracker for precise weapon guidance and all-weather performance. The cupola is structurally modified to support the additional weight of these sensors and associated electronics.
What ammunition does Sea Trinity use?
Sea Trinity is compatible with the full Bofors 40 mm ammunition family, including the 3P programmable all-target round. This gives the system a true multi-role capability against both air and surface targets while simplifying logistics.
How does Sea Trinity provide better coverage than smaller-calibre systems?
The 40 mm calibre offers greater range and engagement time than smaller calibres. The heavier projectile retains more energy and supports advanced fuzing and fragmentation, allowing threats to be engaged at longer distances and increasing the probability of kill with fewer rounds. This reduces the number of ships needed to protect an area and lowers risk to friendly forces and critical infrastructure.
How does Sea Trinity perform in all-weather conditions?
The integrated radar tracker provides all-weather target tracking and engagement capability. Even in poor visibility or challenging electro-optical conditions, Sea Trinity can continue to detect, track and engage incoming threats.
Director Naval Sales
BAE Systems Platforms & Services
Director, Communications
BAE Systems Platforms & Services