Driving the Future of Hybrid Marine Propulsion: ZF’s Expanding Solutions for Tugs and Ferries
As the marine industry accelerates toward cleaner, smarter, and more efficient propulsion, tug and ferry operators are increasingly turning to hybrid systems to reduce emissions and fuel consumption without sacrificing power or maneuverability. With decades of real-world success and a commitment to constant innovation, ZF is helping drive this transition through a portfolio of hybrid-friendly propulsion technologies designed for the demanding conditions these vessels face every day.
As 2025 comes to a close, ZF offers PODs, thrusters, transmissions, and control systems that integrate seamlessly into hybrid architectures while delivering the quality, reliability, and performance that define the ZF brand.
Hybrid-Ready Transmissions and Support for Serial Hybrid Systems
ZF’s hybrid-ready marine transmissions integrate traditional drivetrains with electric propulsion components, supporting serial, parallel, and fully electric hybrid modes. Known for smooth shifting and exceptional efficiency, these transmissions maintain peak performance across the varied load demands typical of tug and ferry operations.
As mentioned, ZF supports serial hybrid configurations, where direct electric motors connect to ZF transmissions or thrusters. This approach allows vessels to operate efficiently on electric propulsion for low-speed or harbor operations, while one or two main engines supply electrical power for on-board systems. For ferries with repetitive duty cycles and tugs working in regulated ports, serial hybridization offers a meaningful path to fuel savings and emissions reduction.
Hybrid-Friendly Thrusters for High-Maneuverability Tugs
Hybrid adoption in the tug market is accelerating, driven by emission regulations in major ports and the need for powerful, efficient propulsion during slow-speed maneuvering and standby operations. ZF’s Retractable Azimuth Thruster (AT) series is engineered to support these needs by delivering exceptional precision, bollard pull assistance, and dynamic positioning performance.
With output ratings up to 2,500 kW and customizable configurations in either L-drive or Z-drive formats, ZF AT thrusters bring versatility to both harbor and escort tugs. When supplied as an L-drive, the AT can include tunnel-thruster capability in its retracted position, allowing a single unit to support multiple operating modes, from transit efficiency to high-precision harbor maneuvers.
Built with a compact, rugged design and supported by ZF’s global service network, these thrusters deliver the reliability tug operators rely on as they transition into hybrid operations.
Hybrid-Ready POD Propulsion for Ferries and Workboats
ZF’s POD propulsion systems bring efficiency and precise maneuverability to vessels where quiet operation and minimal vibration are essential, making them especially suited for ferries, passenger vessels, and coastal workboats. Optimized for both mechanical and hybrid-electric inputs, ZF PODs maximize thrust performance and reduce lifecycle fuel consumption. Their compact, streamlined design preserves valuable onboard space, allowing shipyards to accommodate passengers, cargo, or equipment more efficiently.
Because ZF systems are fully system agnostic, PODs integrate easily with engines, electric motors, power management systems, and energy storage from nearly any manufacturer. This flexibility gives ferry operators the freedom to build hybrid propulsion architectures that meet unique route, load, and regulatory requirements without being locked into a single-brand solution.
TotalCommand: Precision Control for Every Propulsion Setup
ZF’s TotalCommand electronic control system unifies propulsion management for mechanical, electric, and hybrid setups. Delivering smooth throttle response, precise shifting, and intuitive station control, TotalCommand enhances handling in tight ports, docking areas, and congested waterways—critical environments for tugs and ferries. As a system-agnostic solution, it integrates seamlessly with mixed-brand propulsion packages.
Experience, Flexibility, and Unmatched Support
ZF’s strength lies in its extensive experience supporting commercial fleets around the world. The company designs propulsion solutions informed by real-world tug and ferry operations, ensuring durability and performance in tough, repetitive duty cycles.
ZF also provides exceptional customer support through its global service network, the ZF Marine app (available on the Apple Store and Google Play), and the +1-833-ZFWRENCH service hotline. Operators have direct access to expert guidance on transmissions, repowers, troubleshooting, and parts support.
Looking Ahead to 2026
With additional hybrid and electric propulsion technologies set to launch throughout 2026, ZF is expanding its leadership in sustainable marine propulsion. As hybridization reshapes the tug and ferry markets, ZF’s proven quality, engineering expertise, and forward-focused innovation make it a trusted partner for the next generation of commercial vessels.
