This product brochure provides a comprehensive overview of Becker Marine Systems and our full portfolio of high-performance manoeuvring solutions and energy-saving devices. Combining technical expertise with clear, customer-centred insights, it showcases our products, technologies and innovations that optimise vessel efficiency, safety and manoeuvrability across all ship types.
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TRUSTED MANOEUVRING SOLUTIONS INSPIRED BY THE SEA. DRIVEN BY ENGINEERING.
MANOEUVRING SYSTEMS
ENERGY-SAVING DEVICES
SERVICE & CONVERSION
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BECKER MARINE SYSTEMS
About the Company
Product Range
Why Becker Marine Systems
Sustainability
History
MANOEUVRING SYSTEMS
Becker Flap Rudder Becker Twist Rudder
Becker Schilling® Rudder
Becker Nozzle
Rotary Vane Steering Gear Cylinder Type Steering Gear
Becker Daggerboard
Rudder Options
ENERGY-SAVING DEVICES
Becker Mewis Duct® Becker Twisted Fin®
INTELLIGENT MANOEUVRING AND ENERGY-SAVING SOLUTIONS FOR SUSTAINABLE SHIPPING
SERVICE & CONVERSION
Lifecycle Services
Maintenance & Spare Parts Conversions & Retrofits Global Service Network
Amera Conversion Trusted Partner
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Trusted maritime engineering
BECKER MARINE SYSTEMS PIONEERING
Inspired by the sea. Driven by solutions. Becker Marine Systems stands for trusted maritime engineering. Our vision is to shape the future of shipping with sustainable, high-performance manoeuvring and energy- saving solutions. Guided by innovation, respon- sibility and partnership, we deliver technologies that make vessels more efficient, safer and environmentally friendly. Our values – Trust in engineering. Commitment to progress. – are at the heart of everything we do, ensuring long-lasting solutions for shipyards and owners worldwide.
MANOEUVRING & ENERGY-SAVING SOLUTIONS
Becker Marine Systems is a global leader in high-performance rudders and energy-saving devices. Founded in Hamburg more than 75 years ago, the company delivers solutions that combine advanced hydrodynamics, efficiency, and sustainability. With subsidiaries in all major shipbuilding hubs, Becker is close to customers worldwide, ensuring top-quality products and reliable service – from design to long-term operation.
People behind the technology Behind every Becker solution stands a dedicated team of engineers, technicians and service experts with decades of experience in hydrodynamics and shipbuilding. Our people are our strength – highly qualified, passionate and committed to driving maritime innovation. Continuous training and knowledge sharing ensure that we not only deliver products, but also expertise and long-term support for our customers worldwide.
Innovation recognised worldwide
Becker’s pioneering technologies have earned international recognition, from the ground- breaking Becker Flap Rudder® to the award- winning Becker Mewis Duct®. With numerous patents and continuous product innovations, Becker is a trusted partner for shipyards and owners worldwide. Our reputation is built on measurable performance improvements and a proven track record of delivering solutions that set new standards in maritime efficiency.
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Becker Marine Systems offers a full range of manoeuvring and energy-saving solutions tailored to the needs of shipyards, owners, and operators worldwide. Our portfolio combines hydrodynamic expertise, German engineering quality, and proven performance at sea: from high-lift rudders such as the Becker Flap Rudder and Becker Schilling® Rudder, to innovative energy-saving devices like the Becker Mewis Duct® and Becker Twisted Fin®. ADVANCED SOLUTIONS FOR EVERY VESSEL
CYLINDER TYPE STEERING GEAR Robust steering gear with linked cylinder technology.
BECKER MEWIS DUCT® Energy-saving device reducing fuel consumption and emissions.
BECKER TWISTED FIN®
ROTARY VANE STEERING GEAR Compact steering gear with rotary vane design.
BECKER DAGGERBOARD Anti-drift device for wind-assisted propulsion.
Hydrodynamic fin improving propeller inflow and efficiency.
From design to delivery Every Becker product follows a clear process chain: from CFD-based design and model testing, through precision manufacturing within our global production network, to rigorous quality assurance and final installation. This integrated approach ensures that our customers receive tailor-made solutions that are tested, proven and reliable at sea. With a global service network, we accompany our systems throughout their entire lifecycle.
BECKER SCHILLING® RUDDER High-efficiency fishtail rudder for precise control.
BECKER TWIST RUDDER Optimised rudder profile reducing cavitation and drag.
BECKER NOZZLE Ducted propeller system for increased thrust and efficiency.
BECKER FLAP RUDDER High-lift rudder for superior manoeuvrability.
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OUR UNIQUE STRENGTHS:
COMPREHENSIVE PORTFOLIO from manoeuvring systems to energy-saving devices
PROVEN PERFORMANCE with measurable fuel- and emission reductions
Why Becker Marine Systems? We are not only a technology leader – but a partner you can rely on. Our solutions combine hydrodynamic expertise, German engineering quality, and decades of experience with thousands of installations worldwide. TRUSTED PARTNER FOR OWNERS AND SHIPYARDS WORLDWIDE
GLOBAL SERVICE NETWORK for fast response and spare parts availability
CONTINUOUS INNOVATION with CFD, model testing, and in-house R&D
LONG-STANDING TRADITION with a strong commitment to sustainability
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ICELAND
NORWAY
BECKER OFFICES
GLOBAL IMPACT WITH PROVEN PERFORMANCE
SWEDEN
BECKER AGENCIES
NETHERLANDS
BELGIUM
FINLAND
LUXEMBOURG
GERMANY
Becker combines engineering excellence with decades of experience and thousands of successful installations.
FOUNDED 1946
HEAD OFFICE HAMBURG, GERMANY
EMPLOYEES WORLDWIDE ~250
GLOBAL PRESENCE CHINA, GERMANY, KOREA, NORWAY, SINGAPORE, USA
INSTALLATIONS WORDLWIDE 9,000+ Vessels
ENVIRONMENTAL CONTRIBUTION > 22 MIO. TONS OF CO 2 SAVED
USA
ITALY
BALTIC STATES
CHINA (Shanghai)
JAPAN
TURKEY
ARGENTINA
TUNISIA
CHINA (Zhenjiang)
KOREA
75 YEARS OF INNOVATION HISTORY AS WORLD MARKET LEADER FOR HIGH-PERFORMANCE RUDDERS
CYPRUS
PARAGUAY
ALGERIA
SINGAPORE
TAIWAN
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GREECE
URUGUAY
SPAIN
INDIA
AUSTRALIA
COMMITTED TO GREEN SHIPPING
Becker solutions are designed to make shipping more sustainable. Our energy-saving devices such as the Becker Mewis Duct® and Becker Twisted Fin® significantly reduce power consumption and CO₂ emissions, while retrofit programmes extend the lifetime of existing fleets. Certified to international standards, Becker continuously invests in R&D for greener propulsion – supporting the industry’s journey towards decarbonisation.
TOTAL ESTIMATED CO 2 REDUCTION UNTIL TODAY (IN TONS)*
22,754,583+
VESSELS OPERATING WITH BECKER MANOEUVRING SYSTEMS AND ENERGY-SAVING DEVICES
9,000+
R
*Detailed information: CO 2 Savings Disclaimer on www.becker-marine-systems.com
Becker Marine Systems was founded in 1946 in Hamburg by Willi Becker. What began as a small engineering office soon developed into a pioneer in manoeuvring technology. The invention of the Becker Flap Rudder revolutionised ship manoeuvring and laid the foundation for decades of success. Over the years, the product portfolio has expanded to include high-performance rudders, energy-saving devices such as the Becker Mewis Duct®, the Becker Twisted Fin®, and most recently the Becker Daggerboard for wind- assisted propulsion. Today, Becker stands for innovation, quality, and sustainability – shaping the future of shipping with solutions that make vessels more efficient, safer, and environmentally friendly. OVER 75 YEARS OF MARITIME INNOVATION
1961 Inland tank ship ATR1 with the first Flap Rudder
1950s First Becker Flap Rudder developed
1946 Company founded by Willy Becker in Hamburg
From a small Hamburg engineering office to a global technology leader: Becker has continuously set milestones in manoeuvring and efficiency solutions, shaping the future of shipping for more than seven decades. A LEGACY OF ENGINEERING EXCELLENCE
1946 COMPANY FOUNDED BY WILLI BECKER IN HAMBURG
1977 DEVELOPMENT OF THE KING SUPPORT RUDDER
2004 NEW TLKSR® RUDDER SETS NEW STANDARDS
2012 BECKER
TODAY GLOBAL LEADER IN MANOEUVRING AND ENERGY-SAVING SOLUTIONS
TWISTED FIN® INTRODUCED
1940s
1970s
2010s
2020s
1980s–90s INTERNATIONAL EXPANSION WITH GLOBAL SUBSIDIARIES
2008 LAUNCH OF BECKER MEWIS DUCT® GROUNDBREAKING ENERGY- SAVING DEVICE
2020s BECKER DAGGERBOARD DEVELOPED FOR WIND- ASSISTED PROPULSION
1950s FIRST BECKER FLAP RUDDER DEVELOPED
WANT TO KNOW MORE ABOUT OUR HISTORY? Check out our Website
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Becker Flap Rudder
Becker Twist Rudder
MANOEUVRING SYSTEMS Navigate with precision: optimise your manoeuvring experience with our advanced manoeuvring solutions.
Becker Schilling® Rudder
Becker Nozzle
Rotary Vane Steering Gear
Our innovative manoeuvring solutions are designed to optimise vessel control, course keeping and propulsion performance across all vessel types and sizes – even in the most demanding maritime environments. From rudders and daggerboards to advanced steering gear systems, our products aim to maximise manoeuvrability, enhance efficiency, and support environmentally sustainable operations. With precise response behaviour and reliable performance, our solutions ensure safe and agile navigation – whether during complex harbour manoeuvres, low-speed operations, or rough sea conditions. We place high value on durability and ease of maintenance, offering not only robust, long-lasting components but also comprehensive service support – from customised technical advice to rapid spare parts delivery. Your performance, safety and success are at the heart of what we do.
Cylinder Type Steering Gear
Becker Daggerboard
Rudder Options
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RAMELIA, CHEMICAL TANKER Becker Flap Rudder with twisted leading edge and king support bearing.
LINKAGE SYSTEM Low-wear and precise – ensures reliable, backlash- free flap operation
RUDDER STOCK Engineered for high torque in combination with the flap mechanism
MANOEUVRING SYSTEMS BECKER FLAP RUDDER
MOVEABLE FLAP Provides increased lift at the same rudder angle, reduces turning radius
RUDDER TRUNK Adapted to the requirements of the moveable flap
MAIN RUDDER BLADE Hydrodynamically optimised profile for maximum lift with minimal resistance
HINGE SYSTEM Designed for high loads with minimal wear
LEADING EDGE Shaped to prevent flow separation and cavitation
FLAP ANGLE UP TO 65°
Maximum manoeuvrability meets hydrodynamic efficiency
Exceptionally compatible with
Engineered for efficiency. Designed for durability.
Ships with high manoeuvring demands and/or high vessel responsiveness already at small rudder angles
The Becker Flap Rudder represents the culmination of decades of research, development, and practical experience, and is recognised as the most mature flap rudder design in the shipbuilding industry. It offers unparalleled manoeuvrability at all speeds while ensuring the best possible efficiency of the vessel. The design, originated by company founder Willi Becker, has become the global standard among ship operators.
Increased lift in all conditions, improving the vessel's hydrodynamic performance and resulting in smaller turning circles
Improved performance in severe weather conditions
Container Vessels Tankers Ferries & Vehicle Carriers Offshore Vessels & Workboats Fishing Vessels
Balance adjustment improves propeller disk coverage
Up to 65° rudder angles for effective crabbing manoeuvres
Superior low-speed manoeuvrability
BALANCE 47 %
Subject to change and errors, illustrations are similar.
SMART MANOEUVRING WITH THE BECKER FLAP RUDDER
Higher lift due to optimised pressure distribution The Becker Flap Rudder is based on the articulating flap principle, where the hydrodynamic side force (rudder lift) results from the pressure distribution around the rudder blade. The flap rudder achieves a significantly higher-pressure distribution on both the suction and pressure sides, leading to greater lift. After the rudder reaches its stall point, only the positive pressure component remains. Even here, the Becker Flap Rudder exhibits a higher- pressure distribution compared to NACA profiles, which makes the Becker Flap Rudder especially powerful in terms of generated lift and efficiency.
Becker Flap Rudder
NACA Rudder
PROVEN MANOEUVRABILITY Selected projects show the strength of the Becker Flap Rudder – used worldwide for safe and precise ship handling.
RAMANDA, CHEMICAL TANKER Becker Flap Rudder with twisted leading edge and king support bearing
Comparison of pressure distribution suction side pressure side
Up to 90° for precise manoeuvring The Becker Flap Rudder features an additional, moveable flap which amplifies the prescribed rudder angle. A rudder angle of 45 degrees results in a flap angle of 90 degrees. Thus, it responds to smaller rudder angles with significant lateral forces and is especially suitable for ships that need to operate in narrow or restricted water ways. This rudder is very effective in its response, generating significant manoeuvring advantages from small rudder angles onwards.
65°
LURLINE, CONTAINER VESSEL TEU: 3,000 | Becker Flap Rudder with twisted leading edge and king support bearing
ATAIR II, RESEARCH VESSEL Becker Flap Rudder with closed linkage (Heracles)
MANOEUVRING SYSTEMS BECKER FLAP RUDDER
Rudder Options A
SHOW PRODUCT
RAMELIA, CHEMICAL TANKER Becker Flap Rudder with twisted leading edge and king support bearing
TWISTED LEADING EDGE
KING SUPPORT
CLOSED LINKAGE
RUDDER BULB
HEEL PINTLE
RUDDER STOCK Custom-engineered to withstand high torque loads
MANOEUVRING SYSTEMS BECKER TWIST RUDDER
RUDDER TRUNK Robust and precise construction, providing secure sealing and alignment
TWISTED LEADING EDGE Optimises inflow in the propeller wake, reduces cavitation and noise emissions
MAIN RUDDER BLADE Hydrodynamically optimised profile for maximum lift with minimal resistance
Engineered for flow stability and cavitation reduction
Target vessel types
The Becker Twist Rudder represents an advanced technological development specifically designed to effectively utilise the rotating water flow generated by propellers. Its unique twisted profile prevents the formation of low- pressure areas on the rudder surface, which typically cause cavitation and erosion damage. This design enables higher rudder angles even at high speeds. At the same time, it reduces rudder drag and thus enhances the vessel’s propulsion efficiency. Optimised for hydrodynamic precision through twisted leading edge
Efficiency-focused vessels prioritising power and noise reduction
Reduced cavitation and rotational losses
Lower noise and vibration levels
General Cargo Vessels Container Vessels Ferries & Vehicle Carriers Passenger Vessels Gas Carriers
Significant power savings
Optimised profile for enhanced performance and reduced drag
Lighter weight and absence of cast parts for improved efficiency
Extended rudder lifespan
Suitable with rudder bulb technology
Subject to change and errors, illustrations are similar.
BECKER TWIST RUDDER – ENANCING SHIP EFFICIENCY
The special shape of the Becker Twist Rudder ensures that self-induced cavitation is minimised, which not only extends the life-time of the rudder but also reduces maintenance and repair costs. The twisted profile ensures that propulsion efficiency is enhanced by recovering losses from the propeller slipstream. These improved features offer significant benefits for ship handling and the environment. Overall, the Becker Twist Rudder represents a superior solution that significantly improves both the performance and environmental compatibility of modern shipping.
BUILT FOR EFFICIENCY
A selection of vessels equipped with Becker Twist Rudders – tailored to flow and designed to reduce cavitation.
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CONTAINERSHIPS ARCTIC, CONTAINER VESSEL TEU: 1,380 | Becker Twist Rudder with king support bearing
OTTO SVERDRUP, EXPIDITION CRUISE VESSEL Becker Twist Rudder with Rudder Bulb
BOW ORION, CHEMICAL TANKER Becker Twist Rudder
Schematic view of flow interaction between propeller and rudder
CFD simulation of flow interaction between propeller and rudder
MANOEUVRING SYSTEMS BECKER TWIST RUDDER
Rudder Options A
SHOW PRODUCT
COSCO SHIPPING NEBULA, CONTAINER TEU: 21,237 | Becker Twist Rudder with Rudder Bulb
TWISTED LEADING EDGE
KING SUPPORT
CLOSED LINKAGE
RUDDER BULB
HEEL PINTLE
RUDDER STOCK Custom-engineered to withstand high torque loads
MANOEUVRING SYSTEMS BECKER SCHILLING ® RUDDER
RUDDER TRUNK Robust and precise construction, providing secure sealing and alignment
BLUNT LEADING EDGE Improves flow attachment and ensures controlled flow separation
STREAMLINED MID BODY Ensures smooth flow attachment and reduced drag, enhancing lift and efficiency
RUDDER BLADE Hydrodynamically optimised shape for maximum lift with minimal resistance
FISH TAIL Maximises lift and directional control, enabling tight turns and precise manoeuvring even at zero speed
STABILISING FORCES The specially designed rudder profile reduces hydrodynamic resistance and increases lift force
TURNING CIRCLES UP TO 70°
Streamlined mid body for precise control
Ideal choice for:
Unique profile for accelerated flow and improved balance
Ships requiring maximum manoeuvrability at low or zero speed
The Becker Schilling® Rudder is a high-lift rudder with a specially developed profile that enhances the manoeuvrability of vessels of all sizes and types. It is a strategic optimisation of the use of the trailing edge area and its shape is reminiscent of a fish tail. This unique shape accelerates the flow and maximises rudder balance, thereby optimising propeller coverage.
Optimised profile for better hydrodynamic efficiency
Reduced drag and improved flow efficiency
BLUNT LEADING EDGE
Minimal rudder hunting for steady course-keeping
Tankers General Cargo Vessels Heavy Lift Vessels Offshore Vessels & Workboats Fishing Vessels
High lift and reduced weight improve vessel's responsiveness
STREAMLINED MID BODY
Exceptional control for berthing situations and crabbing at zero speed
Reliable steering performance during astern manoeuvres
Reduced cavitation and rotational losses
Stabilising forces
FISHTAIL TRAILING EDGE
Optimal Dynamic Positioning (DP) functionality
Subject to change and errors, illustrations are similar.
BECKER SCHILLING ® TT RUDDER BALANCING MANOEUVRABILITY AND PROPULSION EFFICIENCY Proven performance for your ship The Becker Schilling® TT rudder is a further development of the Schilling® rudder and aims to maximise propulsion efficiency. With a slimmer design and a twisted trailing edge, it offers more efficient performance without compromising manoeuvrability.
HIGH LIFT IN ACTION
While the Becker Schilling® Rudder stands for extreme manoeuvrability, the Becker Schilling® TT Rudder offers a balanced compromise between manoeuvrability and efficiency.
The Becker Schilling® Rudder proves its power where extreme manoeuvrability is needed most.
NATIONAL GEOGRAPHIC QUEST, EXPIDITION CRUISE VESSEL TEU: 1380 | Becker Schilling ® Rudder
General advantages
Combines high lift with twisted profile
Reduced drag and improved flow efficiency
STREAMLINED LEADING EDGE
Optimal balance between manoeuvrability and efficiency
Improved harbour manoeuvring
Provides high lift forces without movable parts
STREAMLINED MID BODY
Tailored for reduced maintenance
Safe operation in various conditions, including ice
Stabilising forces
FISHTAIL TWISTED TRAILING EDGE
Crabbing at zero speed
TUVA KNUTSEN, SHUTTLE TANKER TEU: 12,726 Becker Schilling ® Rudder with king support bearing
ARKLOW CASTLE, GENERAL CARGO SHIP TEU: 12,726 | Becker Schilling ® Rudder
MANOEUVRING SYSTEMS BECKER SCHILLING® RUDDER
Rudder Options A
SHOW PRODUCT
VITUS BERING, BULK CARRIER Becker Schilling ® Rudder with king support bearing
TWISTED LEADING EDGE
KING SUPPORT
CLOSED LINKAGE
RUDDER BULB
HEEL PINTLE
MANOEUVRING SYSTEMS BECKER NOZZLE
STOCK Compact design for integration in slender headbox without heel pintle
NOZZLE RING Rotation of ring to generate steering forces
FIXED FIN Increase of steering forces without additional moving parts
NOZZLE PROFILE optimised for typical ship speeds of small cargo vessels
STEERABLE OR FIXED
Customised nozzle technology for improved ship efficiency
Operational fit
Engineered for efficiency. Designed for durability.
The Becker Nozzle is an innovative nozzle solution from Becker Marine Systems that was developed based on the original Kort nozzle concept. It is available in two main variants: the Becker Fixed Nozzle and the Becker Steerable Nozzle. Overall, the Becker Nozzle increases the manoeuvrability and efficiency of vessels, especially in challenging conditions and at slow speeds, making it an essential component for vessels operating in demanding maritime environments.
Multi Purpose Vessels
No space for rudder required aft of the propeller
Coastal Vessels
Improved capabilities for optimised hull design of length-restricted vessels
Container Vessels
Reduction of hull resistance and improved inflow to the propeller
Increased propulsion efficiency
Compatible with all standard steering gears (steerable nozzle only)
FIXED OR STEERABLE NOZZLE PRECISION IN EVERY DIRECTION
Becker Fixed Nozzle
The Becker Fixed Nozzle, typically used in combination with a Becker Flap Rudder, increases the bollard pull performance of vessels such as AHTS (anchor-handling/ tug/supply) vessels, tugs and fishing boats. Its profile is carefully optimised to produce exceptional thrust performance for vessels with highly loaded propellers.
RELIABLE THRUST. PRECISE HANDLING.
Customised nozzle solutions deliver directional control and propulsion efficiency.
Becker Steerable Nozzle
The Becker Steerable Nozzle profile is adapted to ensure similar performance when the nozzle is rotated. It eliminates the need for separate rudders and offers significantly improved manoeuvrability due to its ability to generate stronger lateral forces at all speeds. This solution is especially suitable for vessel operating in Dynamic Positioning (DP) mode.
Rudder Options
KRIOS, DREDGER Becker Steerable Nozzle with fixed fin
HELIOS, DREDGER Becker Nozzle with flap
MANOEUVRING SYSTEMS BECKER NOZZLE
SHOW PRODUCT
HEEL PINTLE AND FLAP
ROTOR Connected to the rudder stock
CABLE ROD Leads the cable to the terminal box
MANOEUVRING SYSTEMS ROTARY VANE STEERING GEAR
HOUSING
TERMINAL BOX Independent emergency steering push-buttons
FRAME Directs the forces into the vessel structure
INTEGRATED CARRIER & RADIAL BEARING
Mastering the seas with ease.
Designed for:
Compact. Efficient. Reliable.
The Becker Steering Gear features a space-saving, low-pressure hydraulic system – ideal for confined engine rooms. With robust synthetic bearings and a maintenance-friendly rudder carrier, it ensures lasting performance and reliability. Available in eight sizes (160–500 kNm), this system is tailored for smaller vessels such as offshore supply ships, fishing boats, AHTS vessels and yachts.
Supply Vessels
Small installation space required
Coastal Vessels
Minimised internal actuator oil leakage
Anchor Handling Tug Supply (AHTS)
Ro, RoPax
L t
Efficient and low noise pumps
P des A
Multi Purpose / General Cargo
Low energy consumption in stand by mode (down to 5–15%)
Constant working torque from 160 KNm - 500 KNm
Top view on actuator without top cover. Turning clockwise.
Subject to change and errors, illustrations are similar.
STEERING GEAR ROOM
BRIDGE
FUNCTIONAL OVERVIEW KEY COMPONENTS BY LOCATION
ROTARY VANE STEERING GEAR
STEERING GEAR PUMP 2 ALARM & CONTROL HPU 1 ALARM & CONTROL SYSTEM
STARTER BOX HPU 1
CONTROL BOX
ALARM & CONTROL HPU 2
STEERING GEAR PUMP 2
STARTER BOX HPU 2
INPUT: ELECTRICAL SUPPLY
INPUT: TURNING COMMAND (STB OR PS)
ECR
STEERING GEAR ROOM
BRIDGE
ALARM & CONTROL HPU 1
STEERING GEAR PUMP 2
COMPACT ACUATOR
STARTER BOX HPU 1
HPU 1
HPU 2
CONTROL BOX
ALARM PANEL
ALARM & CONTROL HPU 2
STEERING GEAR PUMP 2
STARTER BOX HPU 2
Functional overview of the Rotary Vane Steering Gear system with key control and power components
OUTPUT: RUDDER TURNING
Alarm & Control System ՠ Receives commands from the vessel control system (FFU / NFU / Autopilot) and executes them - 'turn starboard (SPB)' or 'turn portside (PS)' ՠ Alarm & control panels monitor the connected components, indicate warnings and failures and enable the user to switch the HPUs on or off ՠ One alarm panel in the engine control room (ECR) monitors the connected components and indicates warnings as well as failures ՠ In case of emergency, the steering gear can be controlled by a terminal box near the rudder actuator (with starter box switched to ‘local operation’)
Hydraulic Power Unit (HPU)
ՠ Each HPU is equipped with at least one oil tank, one electrical motor and one hydraulic pump ՠ Safety valves protect the actuator from overload pressure ՠ Uses a closed-loop hydraulic system with a variable displacement pump, suitable for torque up to 500 kNm. ՠ Temperature sensor and oil-level switches provide monitoring information for the alarm system ՠ Up to two HPUs can be mounted on one transport grid (see figure) BRIDGE STEERING GEAR PUMP 2 ALARM & CONTROL HPU 1
INPUT: ELECTRICAL SUPPLY
INPUT: TURNING COMMAND (STB OR PS)
ECR
STEERING GEAR ROOM
INPUT: ELECTRICAL SUPPLY
INPUT: TURNING COMMAND (STB OR PS)
STEERING GEAR ROOM
BRIDGE
ALARM & CONTROL HPU 1 COMPACT ACUATOR
STARTER BOX HPU 1
STEERING GEAR PUMP 2
STARTER BOX HPU 1
HPU 1
HPU 2
HPU 1
HPU 2
CONTROL BOX
ALARM PANEL
LINKED TYPE ACUATOR
CONTROL BOX
ALARM PANEL
ALARM & CONTROL HPU 2
ALARM & CONTROL HPU 2
STEERING GEAR PUMP 2
STEERING GEAR PUMP 2
STARTER BOX HPU 2
STARTER BOX HPU 2
Types and specifications
ROTARY VANE ACTUATOR
HYDRAULIC POWER UNIT (HPU)
TYPE
WORKING TORQUE (KNM)
RUDDER ANGLE RANGE (DEG)
ACTUATOR WEIGHT (TO)
OUTPUT: RUDDER TURNING
BMS 160-2 BMS 200-2 BMS 250-2 BMS 250-3 BMS 315-2 BMS 315-3 BMS 400-3 BMS 500-3
160
2x 65 2x 65 2x 65 2x 45 2x 65 2x 45 2x 45 2x 45
2,2 2,5 3,9 2,2 4,3 2,5 3,9 4,3
OUTPUT: RUDDER TURNING
200 250 250 315 315 400 500
MANOEUVRING SYSTEMS ROTARY VANE STEERING GEAR
SHOW PRODUCT
TILLER Connected to
CYLINDER For turning the tiller, one cylinder pushes (extension) and the other pulls (retraction)
rudder stock by a conical press-fit
MANOEUVRING SYSTEMS CYLINDER TYPE STEERING GEAR
SUPPORT Welded to ship structure
Compact Power. Smart Control.
Application focus:
Precision and performance for an advanced steering experience.
The Linked Cylinder Type Steering Gear from Becker Marine Systems offers scalable torque, a compact layout and smart design. Its simple operating principle ensures reliable manoeuvring and low maintenance, even under tough conditions. With standardised hydraulic units and control systems, this solution is robust, efficient, and easy to integrate into any vessel design.
Suitable for vessels with rudder angles of up to 45 degrees, such as:
Simple working principle
Multi Purpose Vessel General Cargo Vessels Container Feeder Vessels Working Boats Yachts
Low maintenance effort
Robust against rudder bearing wear
One supplier for complete manoeuvring unit (steering gear and rudder)
Customised actuator sizes for small installation spaces
Subject to change and errors, illustrations are similar.
FUNCTIONAL OVERVIEW KEY COMPONENTS BY LOCATION
INPUT: ELECTRICAL SUPPLY
INPUT: TURNING COMMAND (STB OR PS)
ECR
STEERING GEAR ROOM
BRIDGE
ALARM & CONTROL HPU 1
STEERING GEAR PUMP 2
STARTER BOX HPU 1
CONTROL IN EVERY MOVE
HPU 1
HPU 2
LINKED TYPE ACUATOR
CONTROL BOX
ALARM PANEL
ALARM & CONTROL HPU 2
STEERING GEAR PUMP 2
STARTER BOX HPU 2
Cylinder type steering systems ensure smooth operation.
Functional overview of the Cylinder Type Steering Gear system with key control and power components
CLUB MED 2, CRUISE SHIP Becker Cylinder Type Steering Gear
OUTPUT: RUDDER TURNING
Alarm & Control System ՠ Receives commands from the vessel control system (FFU / NFU / Autopilot) and executes them - 'turn starboard (SPB)' or 'turn portside (PS)' ՠ Alarm & control panels monitor the connected components, indicate warnings and failures and enable the user to switch the HPUs on or off ՠ One alarm panel in the engine control room (ECR) monitors the connected components and indicates warnings as well as failures ՠ In case of emergency, the steering gear can be controlled by a terminal box near the rudder actuator (with starter box switched to ‘local operation’)
Hydraulic Power Unit (HPU)
ՠ Each HPU is equipped with at least one oil tank, one electrical motor and one hydraulic pump ՠ Safety valves protect the actuator from overload pressure ՠ Uses an open- or a closed-loop hydraulic system with a variable displacement pump, suitable for torque up to 1,000 kNm ՠ Temperature sensor and oil-level switches provide monitoring information for the alarm system ՠ Up to two HPUs can be mounted on one transport grid (see figure)
Scalable performance, smart system design
OCTOPUS, YACHT Becker Cylinder Type Steering Gear
NORDSEE, DREDGER Becker Cylinder Type Steering Gear
Working torque from 100 to 1000 kN m with a rudder angle range up to ± 45 degree
Parametric design of actuator
MANOEUVRING SYSTEMS CYLINDER TYPE STEERING GEAR
SHOW PRODUCT
Standardised design of hydraulic power units
Standardised design of control and alarm system
HYDRAULIC DRIVE Reliable deployment and retraction supported by proven hydraulic technology
HIGH ASPECT RATIO (>5) Slender geometry for maximum lift efficiency and reduced induced drag
PLC CONTROLLED Automated operation with flexible control and integration into ship systems
MANOEUVRING SYSTEMS BECKER DAGGERBOARD
OPTIMISED PROFILE Optimised hydrodynamic shape ensuring efficiency and stability under varying flow conditions
FOLDABLE FUNCTION
Ensures safe retraction for port manoeuvring or in case the wind system is not in use
LEEWAY ANGLE REDUCTION
LIFT/DRAG RATIO > 20
Passive stabilisation reduces drift and improves course- keeping under WAPS operation
Superior performance for effective side force compensation with minimal resistance
Smarter navigation for wind-powered vessels
Suitable for all WAPS- equipped vessels
Optimised side force compensation for wind-assisted vessels.
The Becker Daggerboard is compatible with all types of Wind Assisted Propulsion Systems, including:
The Becker Daggerboard is an innovative solution for vessels with Wind Assisted Propulsion Systems (WAPS). With over 75 years of hydrodynamic expertise, Becker combines decades of rudder design with the latest insights into wind propulsion to address a key challenge: leeway. WAPS technologies generate both thrust and lateral forces, which cause drift, course deviation and increased drag. The Becker Daggerboard – a fully retractable underwater fin system – minimises leeway and enables vessels to realise the full power-saving potential of wind propulsion.
Efficient side force compensation: Reduces leeway angle for more accurate course-keeping and lower rudder activity Maximised WAPS efficiency: Retains the full power savings generated by the wind system by avoiding drag penalties Retractable for flexibility: Fully retractable via hydraulic drive to allow unrestricted operations in shallow waters or during port manoeuvring Hydrodynamic expertise: Fin profiles optimised using Becker’s advanced CFD capabilities and proven rudder technology Tailored design: Each unit is custom-designed for the vessel’s hull geometry and WAPS configuration
Rotor sails
Rigid wing sails
Kite systems
Suction-based sail systems
Subject to change and errors, illustrations are similar.
BECKER DAGGERBOARD THE MISSING LINK BETWEEN WIND PROPULSION AND HYDRODYNAMIC CONTROL
The Becker Daggerboard solves this challenge by minimising drift and drag, thus ensuring vessels capture the full return on investment from WAPS while lowering power costs and emissions.
Wind-Assisted Propulsion Systems (WAPS) unlock significant power savings, but their side forces create leeway that reduces efficiency.
PRECISION UNDER SAILS
How the Daggerboard improves the efficiency of WAPS:
First installations demonstrate how the Becker Daggerboard stabilises course and reduces drift in wind-assisted vessels.
A LOW COMPENSATION: Minimal underwater lift results in significant leeway; the ship drifts noticeably sideways. B MODERATE COMPENSATION:
RORO VESSEL FOR LOUIS DREYFUS ARMATEURS (LDA) Installation of two foldable Daggerboards per vessel Fin area: 8.8 m² | Lift force: 300 kN at 8° and 14 knots
The underwater body provides some counterforce; the ship maintains a forward course but with visible drift.
C HIGH COMPENSATION:
An optimised underwater profile – such as with a daggerboard – aligns heading and course over ground. Lateral drift is minimised, improving navigational efficiency.
Two tailor-made solutions for efficient drift reduction
With PLC-controlled hydraulics and an optimised profile, they deliver high lift and low drag for efficient leeway compensation.
Becker offers two daggerboard models – liftable and foldable – tailored to different vessel types and operational needs. Both retract fully into the hull for safe navigation in port, shallow waters, or in times the WAPS is not in active use.
FEATURE
LIFTABLE DAGGERBOARD Symmetrical (NACA)
FOLDABLE DAGGERBOARD Symmetrical (NACA)
Profile
Rotatability
Rotatable
Fixed (non-rotatable)
Aspect Ratio
Approx. 1.5
High (> 5)
SAILING CARGO VESSEL FOR TRANSOCEANIC WIND TRANSPORT (TOWT) Installation of two liftable Daggerboards Fin area: 7.68 m² | Blade force: 7 knots (with 0° heeling) 50 kN
Lift/Drag Ratio
> 4
> 20
Leeway Reduction
Active and highly efficient
Passive, through high aspect ratio
Retraction Function
Fully retractable into the hull
Fully retractable into the hull
Crash Protection
Predetermined breaking point at shaft coupling Emergency fold function
MANOEUVRING SYSTEMS BECKER DAGGERBOARD
Drive System
Hydraulic
Hydraulic
SHOW PRODUCT
Control System
PLC-controlled
PLC-controlled
Installation Requirements
Vertical construction through several decks
Compact horizontal folding mechanism
Twisted Leading Edge
Improved rudder efficiency and minimised risk of cavitation
MANOEUVRING SYSTEMS RUDDER OPTIONS
Efficiency, protection and performance – combined in one smart rudder design. A twisted rudder reduces cavitation by evening out pressure on the blade, improving efficiency and lowering erosion. Its split-profile design aligns with the propeller wake, cutting drag and enhancing overall performance.
Strong rotational flows from the propeller create areas of low pressure on the rudder blade.
King Support Bearing
The key to large full spade rudders The Becker King Support enables large full-spade rudders up to 130 m² with a slim profile. By moving the main bearing closer to the force centre, bending moments are reduced, resulting in a more stable and efficient rudder. The design reduces maintenance needs thanks to a smart bearing arrangement design and no rudder horn and improves manoeuvrability at low speeds.
Rudder with King Support Bearing
Heel Pintle
Customised functions for maximum efficiency and safety.
Custom-fit solutions for:
Effective rudder control for offshore vessels and workboats
Discover the wide range of options and additional functions that take our rudder and manoeuvring systems to the next level. By using these options, you can, for example, achieve improved rudder efficiency, minimise the risk of cavitation or increase the performance of your systems under special environmental conditions. Whether larger rudders with the same efficiency, protection against extreme environmental influences or special adaptations for use on fishing boats - our customised solutions offer you numerous advantages to make the operation of your ships even more efficient and safer.
Becker Flap Rudder
Becker rudders with heel pintle are ideal for smaller and slow-moving vessels like tugs or fishing boats. They offer additional stability and reduced risk of interaction between the rudder and ropes or nets. The design reduces bending moments, allows for a slender rudder blade and requires only a compact steering gear.
Becker Twist Rudder
Becker Schilling® Rudder
Becker Nozzle
The heel pintle arm acts like a rope guard and protects the rudder from ropes and nets.
Subject to change and errors, illustrations are similar.
Rudder Bulb
More efficiency through targeted flow control The Becker Rudder Bulb improves flow from the propeller hub to the rudder, reducing vortex strength and cavitation while increasing efficiency. CFD-simulations and tank tests confirm power savings of up to 1.5 %. Suitable for various vessel types and propeller systems, it can be used in both new builds and retrofits.
TAILORED RUDDER SOLUTIONS
Custom options designed for maximum efficiency and safety.
Closed Linkage
MONTELOURIDO, FISHING VESSEL Becker Flap Rudder with heel pintle
Closed connecting linkage for demanding environments
Designed for harsh environments, the closed linkage protects the flap mechanism from ice, sand and impact while ensuring smooth manoeuvring. With integrated overload protection and reduced hydrodynamic noise, it offers maximum reliability and durability under extreme conditions.
SCANDIA SEAWAYS, RORO CARGO VESSEL Becker Flap Rudder with twisted leading edge and rudder bulb (twin rudder system)
RAMELIA, CHEMICAL TANKER Becker Flap Rudder with twisted leading edge and king support bearing
MANOEUVRING SYSTEMS RUDDER OPTIONS
Rudder Options
A
SHOW PRODUCT
TRIUMPH, CONTAINER VESSEL TEU: 12,726 | Becker Flap Rudder with king support bearing
TWISTED LEADING EDGE
KING SUPPORT
CLOSED LINKAGE
RUDDER BULB
HEEL PINTLE
8 6 4 2 9M 8 6 4 2 8M 8 6 4 2 7M 8 6 4 2 6M 8 6 4 2 5M 8 6 4 2 4M 8 6 4 2 3M 8 6 4 2 2M 8 6 4 2 1M
ENERGY-SAVING DEVICES
Driving green shipping forward: The impact of Becker’s solutions on maritime sustainability.
The main energy-saving devices from Becker Marine Systems include the Becker Mewis Duct® and the Becker Twisted Fin®, two groundbreaking solutions that significantly contribute to increasing energy efficiency and to reducing power consumption and CO 2 emissions. Independent model tests and CFD simulations demonstrate that the use of these energy-saving solutions can lead to significant energy savings. Reductions of up to 10% for tankers and bulk carriers and up to 4% for container ships are herewith realistic. These significant efficiency improvements are crucial for complying with environmental and emission standards, especially in relation to the Energy Efficiency Existing Ship Index (EEXI) and the Carbon Intensity Indicator (CII). The energy-saving devices have a direct contribution to improve the EEXI (by an increase of the reference speed) and CII (by reducing the vessels CO 2 emissions). Therefore, the Becker Mewis Duct® and the Becker Twisted Fin® are cost-effective measures for promoting an even more sustainable shipping – applicable during newbuild or as retrofit.
Becker Mewis Duct®
Becker Twisted Fin®
8 6 4 2
CMA CGM TENERE, CONTAINER VESSEL TEU: 14,812 | Becker Twisted Fin®
CUSTOMISED FINS Guides water flow into the propeller, each vessel is optimised through CFD-simulations for maximum efficiency
UPPER BRACKET Provides structural connection and stability between duct and hull
ENERGY-SAVING DEVICES BECKER MEWIS DUCT®
DUCT Accelerates and equalises the inflow, improving propeller performance and reducing power consumption
PROPELLER SHAFT Transmits engine power to the propeller, driving the vessel forward
HULL Main body of the vessel – integrated design ensures smooth hydrodynamic transition
ENERGY SAVINGS OF UP TO 10%
Sustainable performance for every voyage
Optimised for:
Leading the way in eco-conscious shipping
The Becker Mewis Duct® sets the benchmark for energy efficiency on slow and full-form vessels such as tankers and bulkers. By streamlining the inflow to the propeller, it cuts power consumption and CO₂ emissions by up to 10%. This proven device delivers fast payback while helping operators meet EEDI, EEXI and CII requirements. Easy installation during newbuilding stage or regular dry dock makes it a costefficient step towards greener, more profitable operations.
Reduction of power consumption and CO 2 emissions by improving the hydrodynamic efficiency of the propeller
Bulker
Gas Carriers
Supporting ship owners in fulfilling IMO requirements regarding EEXI and CII
General Cargo
Tanker
Easy installation during regular dry docks
Reduction in operating costs through savings in propulsion power of up to 10%
Wide range of applications and proven effectiveness: over 1,800 ships already successfully equipped with Becker Mewis Duct®
EASY INSTALLATION FOR NEWBUILDINGS AND RETROFITS
Newbuildings Installation of the Becker Mewis Duct® can easily be performed during the docking or block stage with minimal effort on part of the shipyard. The yard is able to implement the installation in the production schedule. The Becker construction team adapts the interfaces of the Becker Mewis Duct® and the ship according to the ship’s steel structure.
Retrofits
The Becker Mewis Duct® can be retrofitted during regular dry dockings or even intermediate dry dockings, the propeller does not have to be dismantled for this. Becker’s expertise ensures that installation is performed as quickly as possible, taking five days on average. Installation is carried out by the yard under Becker’s supervision to ensure professional installation. The Becker Mewis Duct® design provides the highest strength and stiffness in accordance with classification societies.
A RETROFIT SUCCESS
Our Becker Mewis Duct® references span all vessel types – demonstrating reliable CO₂ reduction and energy efficiency.
ALEXANDER BRAZIL, OIL TANKER Becker Mewis Duct®
Optimisation of ship propulsion with the Becker Mewis Duct ®
Wakefield equalisation
Reduction of propeller hub vortex
Contra-rotating swirl
1
2
3
The Becker Mewis Duct® straightens the hull’s wake, accelerates the flow towards the propeller and usually produces additional forward thrust.
An optimised flow field behind the duct significantly reduces the hub vortex, leading to improved thrust and flow towards the rudder.
Due to individually placed fins, a counter-rotating pre-swirl is generated, optimising the loads on the propeller blades.
RYSTRAUM,CHEMICAL TANKER Becker Mewis Duct® (retrofitted)
HOWARD O. LORENZEN, RESEARCH VESSEL Becker Mewis Duct® (retrofitted)
ENERGY-SAVING DEVICES BECKER MEWIS DUCT®
The Becker Mewis Duct® harmonises and stabilises the flow, generating a pre-swirl to reduce the rotational losses in the propeller slipstream.
SHOW PRODUCT
BOW TRIUMPH, CHEMICAL TANKER Becker Mewis Duct®
FIN TIP Twisted end of the fin minimising cavitation and enhancing flow alignment
DUCT RING Directing inflow to the propeller, boosting thrust and efficiency.
ENERGY-SAVING DEVICES BECKER TWISTED FIN ®
FIN Hydrodynamic surface guiding water flow for improved propulsion efficiency
FIN (blended into duct) Smooth transition merging with the duct for reduced turbulence and higher stability.
FAIRING PIECE Streamlined connection element reducing flow resistance and drag
ENERGY SAVINGS OF UP TO 4%
Smarter flow, smoother operation
Proven efficiency gains for
Elevating efficiency: best practice solution for slender vessels
The Becker Twisted Fin® is the smart choice for faster vessels like container ships with slender sterns. Positioned ahead of the propeller, it generates a pre-swirl that boosts efficiency, lowers operational costs and reduces emissions by up to 4%. Its compact design with no moving parts ensures easy integration and long-term reliability. Fully class-approved, the system strengthens EEXI and CII ratings and delivers measurable savings for forward-looking ship owners.
General energy savings of up to 4%
Container Vessels
Less cavitation and reduced vibration
Gas Carrier
Improved propulsion efficiency and course keeping
Ferry & Vehicle Carrier
Reduction of CO 2 emissions Suitable for newbuildings and retrofits
Navy Vessels
No moving parts, no maintenance required
Fast installation
EASY INSTALLATION FOR NEWBUILDINGS AND RETROFITS
The Becker Twisted Fin® is designed for seamless integration into both newbuildings and existing vessels. Thanks to flexible interfaces and Becker’s proven expertise, installation can be carried out quickly and reliably with minimal disruption.
Newbuildings
Retrofits
՟ Installation during docking or block stage with little extra effort for the shipyard ՟ Fully adaptable interfaces to match the ship’s steel structure
՟ Installation during regular or intermediate dry dockings without propeller removal ՟ Average installation time of only five days ՟ Yard execution under Becker supervision for highest quality standards ՟ Interfaces designed for maximum strength and stiffness in line with class rules
PROVEN POWER SAVINGS A look at successful applications where the Becker Twisted Fin® reduces propeller losses and saves energy.
՟ Simple integration into the production schedule
CMA CGM BRAZIL, CONTAINER VESSEL TEU: 15,128 | Becker Twisted Fin®
Pre-swirl optimisation
Wakefield equalisation Tailored engineering for measurable results – every Becker Twisted Fin® is designed with customised CFD simulations to unlock maximum efficiency for your vessel. ՟ Duct ring accelerates and harmonises inflow with surrounding water ՟ Improves overall flow towards the propeller and generates thrust ՟ Tailored CFD simulations for each vessel ensure maximum efficiency gains
Typical nominal wakefield of a 10.000 TEU container vessel.
EVER APEX, CONTAINER VESSEL TEU: 23,888 | Becker Twisted Fin®
Pre-Swirl for optimised propeller load
Smart flow solutions made to fit – Becker Twisted Fin® designs are customised through advanced CFD simulations, perfectly matching hull and propeller geometry for superior performance. ՟ Fins re-direct flow counter to propeller rotation for optimised load ՟ Increases propeller efficiency and reduces hub vortex formation ՟ Customised CFD simulations deliver the best design for every ship
ENERGY-SAVING DEVICES BECKER TWISTED FIN®
SHOW PRODUCT
MAERSK HERRERA, CONTAINER VESSEL TEU: 15,226 | Becker Twisted Fin®
Typical nominal wakefield of a 10.000 TEU container vessel.
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