electric harbour vessels
Castalia, Europe’s first zero-emission harbour vessel
At SYM Naval, we are leading the transition towards sustainable port operations with the development of fully electric vessels. Castalia, our first 100% electric harbour unit, proves that zero-emission propulsion can combine efficiency, versatility and reliability in daily service.
With 12.5 metres length, 485 kWh battery capacity and up to 10 hours of autonomy, Castalia integrates advanced engineering with multipurpose capabilities such as mooring assistance, waste collection, personnel transfer and environmental monitoring.
By combining tailor-made design with certified processes, Castalia sets a new benchmark in zero-emission shipbuilding, paving the way for the next generation of electric vessels worldwide.
Zero-emissions technology for cleaner seas
Main specifications
Castalia 100% electric harbour vessel
The Castalia is Europe’s first fully electric multipurpose harbour vessel, designed to combine sustainability with efficiency. With a 12.5 m length, 485 kWh battery pack and two 250 kW electric motors, it delivers zero-emission operations with up to 10 hours of autonomy.
100% electric propulsion powered by high-capacity LiFePO batteries, eliminating emissions and reducing noise for cleaner, quieter port operations.
Up to 10 hours of continuous service with flexible navigation modes (eco, cruise, manoeuvre) to optimise autonomy and operational efficiency.
Integrated CAN BUS diagnostics and real-time monitoring give operators full visibility of propulsion, batteries and navigation systems.
Comprehensive safety features include battery monitoring, gas detection and alarm protocols, ensuring reliability in demanding harbour conditions.
Design & engineering
The Castalia is conceived as a zero-emission working platform, integrating advanced electric propulsion with intelligent control systems. Its architecture prioritises energy efficiency, adaptability and operational safety, enabling the vessel to carry out multiple harbour tasks with minimal environmental footprint.
A central CAN BUS system manages propulsion, batteries and navigation, providing operators with full visibility and real-time diagnostics. Navigation modes —eco, cruise and manoeuvre— optimise power consumption and extend autonomy depending on each operation.
Safety is reinforced through continuous monitoring and alarm protocols, ensuring reliability even in demanding harbour conditions. Built under certified processes and international standards, the Castalia demonstrates how innovation and durability can come together in the next generation of electric harbour vessels.
Applications in port operations
Sustainable solutions with zero emissions
The Castalia proves how electric harbour vessels can replace traditional diesel units in critical port operations, delivering efficiency with full environmental responsibility. By eliminating emissions and reducing noise, it enhances working conditions while contributing to cleaner and safer harbours.
- Supports mooring and unmooring operations with zero environmental impact.
- Performs waste collection and transport in compliance with international standards.
- Transfers crew, passengers and supplies safely and efficiently.
- Provides environmental monitoring and emergency response with silent, emission-free operation.
A benchmark for the future of sustainable ports
With the Castalia, SYM Naval demonstrates that zero-emission vessels are not just a vision but a reality already serving daily port operations. Built under certified processes and international standards, it combines innovation, efficiency and sustainability, setting a new benchmark for the maritime industry.