zero speed stabilizers yacht

• THE PRINCESS PASSPORT
• Email Newsletter
• Yacht Walkthroughs
• Destinations
• Electronics
• Best Marine Electronics & Technology
• Boating Safety

• Uncategorized

At-Anchor Stabilization Systems

• By Dudley Dawson
• Updated: October 26, 2010

Stabilizing a yacht under way is one thing; stopping the roll when you’re sitting still is another. Flume tanks are a possibility for newly built superyachts, but existing and smaller yachts have better options.

The first, known as zero speed or at-anchor stabilization, is a variant of the active fin stabilizer system that has proved itself aboard yachts for many years. The differences are found in the fins, the actuators and the control system. There’s little the user will notice about the controls except a new selector for the “underway” and “anchored” settings.

The fins are another matter. Standard fins depend on the forward speed of the yacht to create lift that is transferred to the hull to counteract roll. To keep the size of the fin actuator and the resultant power to a minimum, the location of the shaft on which the fin rotates is as near to the hydrodynamic center of effort as possible, creating a balance of forces forward and aft of the shaft. With a yacht at anchor, there is no forward speed, so the fins operate less like wings and more like paddles. As such, they have a much lower aspect ratio, being considerably longer fore-and-aft. The shaft location changes too, moving forward, since balance is not as important as the total sweep of the trailing edge of the fin. As with a paddle, the farther it moves, the more force it delivers.

This difference brings up two very important questions: Can you convert to one of the new systems, and should you? In answer to the first question, yes, you can often retrofit an existing, active fin stabilization system to enjoy at-anchor benefits. You’ll need a new or upgraded control system, and while you may be able to utilize your existing fins, they will not be as effective as new, longer fins. If you go to new fins, they’ll require more power, and your existing actuator may not be up to the task. Some actuators can be modified to provide more oomph, but in other cases, an upgrade or replacement will be required. The system manufacturers can assist you with this determination, technically and dollarwise, on a case-by-case basis.

Yachts can also enjoy at-anchor stabilization with gyroscopic systems. Interestingly, about 50 years ago, there were dozens of yachts with gyro stabilizers, but they weren’t as compact or sophisticated as today’s units are. Gyros fell out of favor when active fins became available, but with new designs and materials, they are once again competitive. They operate on the same principle as the kid’s toy of the same name — which is, essentially, that it takes considerable force to displace a spinning wheel. The more massive the wheel and the faster you spin it, the greater the force. That force, transferred into the hull structure through the gyro’s foundation, counteracts the rolling of your yacht.

Gyro stabilizers are available in a number of sizes, and several smaller units can be installed instead of one large one to achieve equivalent stabilization. They can be located almost anywhere on the yacht, so they offer flexibility in installation and don’t have any parts exposed to the sea. The downside lies in that connection between weight and force. These units contain heavy flywheels that can add a noticeable amount of displacement to your yacht, and the machinery generally occupies more interior volume than fin systems do.

Next month, we’ll look at trim control and integrated motion-control systems that reduce both roll and pitch for the ultimate in stabilization.

Check out Part 1 & 3 of our ride-control series.

• More Uncategorized

BoatUS Launches Online Advocacy Tool

Dock Danger

A Dream Fulfilled

3 America’s Cup Hashtags to Follow

Power Catamaran Popularity Rising

For Sale: Sunseeker Predator 68

For Sale: CL Yachts CLB 72

10 Yachts Under $500,000 You Can Have Today

• Digital Edition
• Customer Service
• Privacy Policy
• Email Newsletters
• Cruising World
• Sailing World
• Salt Water Sportsman
• Sport Fishing
• Wakeboarding

Find your stabilizer in 5 easy steps

• Personalized rapport
• Completely free
• Done in 3 minutes!

Choose your type of yacht

Select comparable yacht.

Is this your ' ' yacht?

Under what circumstances do you require stabilisation?

Please indicate your preference(s) below

Do you have an existing yacht or is this for a new build?

Is there an existing system.

Is the yacht already fitted with a stabilisation system?

Please provide information about your existing system

We've found a suitable stabilisation solution for you.

Please fill in your information to gain access to your solution

Hi , your solution:

Price indication & full report.

To receive a price indication & full report please confirm below

DMS MagnusMaster

• Ultimate stabilisation from 3 to 12 knots
• All-electric
• Maintenance-free - 5-year warranty
• No. 1 choice Dutch yacht yards

DMS Universal

• Advanced modern operating system
• Suitable for all existing hydraulic fin stabilisers
• Expansion to soft zero speed stabilisation
• Every size yacht, every speed

DMS Anti Rolling Gyro

• Optimal zero speed stability for all vessels up to 250 tonnes
• 5-year warranty
• The best price/quality ratio
• Robust design for unrivalled lifespan

DMS All-in-One

• Stabilisation system suitable for all yachts and all speeds
• New development
• Available from 2024

DMS AntiRoll

• For slow-moving superyachts > 30 metres
• Custom built
• Optimal stabilisation at anchor and underway

Thanks for scheduling a call back. We’ll get in touch as soon as possible.

For low-speed cruising and semi-displacement yachts up to 30 metres

Report & Price indication

Get a full report and price indication

Manual & Tech sheets

Download in our knowledge centre

More comfort and safety at sea

You cannot compare the MagnusMaster with other conventional stabilisation systems due to its technical innovation and better results. This latest generation of rotor stabilisers provides roll damping at low speeds of 3 to 12 knots on yachts up to 30 metres. At speeds above 12 knots, the Magnus effect no longer increases and therefore the DMS MagnusMaster automatically retracts.

When retracted, the rotors remain largely within the turbulent boundary layer of the vessel, meaning resistance is negligible.

View the online MagnusMaster brochure for more info and video testimonials.

The Magnus Effect

It is a work of high-quality technology based on a universally acknowledged law of nature: the Magnus effect , that works in both liquid and air, was discovered and documented by Heinrich Magnus. DMS Holland has been able to optimise this effect by developing and applying advanced new techniques. Would you like to know more about the Magnus effect? Click here for further information.

DMS Holland has been able to optimise this effect by developing and applying advanced new techniques. To guarantee durability and continuity, the system uses electronic components from the well-known German brand Lenze, including electric motors, displays, drives and servo motors.

For New Build or Retrofit Installation

DMS MagnusMaster stabilisation is increasingly becoming the system of choice for many new build production motor yachts as well as for one off specialist projects. Whether a single, twin or even 4 rotor system (depending on the length and weight of the boat), shipyards are finding its versatility of positioning, compact size and ease of installation makes it a far more viable option than many other fin or gyro systems. Owners are not only attracted to MagnusMaster for its superior low speed performance, but also for its quality, reliability and pure simplicity of operation when they want to use it.

Thanks to all the above factors, MagnusMaster is also ideally suited to retrofit applications and, as an all electric system, there is no need to install complicated hydraulic packs. It is so compact and versatile in its positioning that a suitable location can almost always be found without major upheaval to the engine room or interior. In most cases installation from start to finish can be completed in a matter of a few weeks with the minimal of disturbance to existing systems.

Advantages of the MagnusMaster over conventional fin stabilisers:

As the effectiveness of the rotors is already very noticeable at low speeds, the risk of seasickness is minimal.

The innovative system drive ensures far fewer moving parts, resulting in reduced noise level. The MagnusMaster is simply very quiet.

The control of the system is user-friendly and can be integrated into the onboard system. Operation is simple via an easy-to-read full-colour touch screen.

The MagnusMaster has been developed for your convenience.

Improved roll damping

Roll damping with the MagnusMaster is much more effective when the yacht is at speeds of 3 to 12 knots. The MagnusMaster is suitable for yachts up to 30 metres.

Minimal risk of breakdown

The MagnusMaster is fully electric and directly driven, eliminating the need for a fan belt. Maintenance-free bearings are used around the shafts. DMS has kept the technology as simple as possible, so that hydraulics, pumps, cylinders and pressure pipes are not necessary. This makes leaks and other hydraulic-related malfunctions, as well as unpleasant noise, a thing of the past.

Your MagnusMaster stabilisers do their job worry-free, safely, quietly and very effectively.

Very compact and retractable

The entire system is electrically retractable, preventing damage in shallow water. When retracted, the rotors remain within the turbulent boundary layer of the hull and resistance is therefore negligible, producing a favourable effect on fuel consumption. When retracted, they are almost impossible to damage during transport.

Because the rotors do not have any steering effect, the positioning — unlike with traditional fins — can be freely determined and a suitable place can always be found to install the very shallow and compact electric motor. Loss of space is therefore kept to a minimum and major renovations in the engine room are not necessary.i

Safe and considered

At DMS, the safety of people on board is key. That is why the rotors are automatically retracted when the vessel’s engine is put into neutral or the drive drops out. This prevents damage during maneuvering and mooring at a quay, lock, harbour or around other vessels and safety is guaranteed.

Specifications

• Maximum Power: 1500W (per rotor) • Average Consumption: 1000W (per rotor) • Voltage: 230 Volt Single Phase AC + 24 Volt DC • Rotor Material: Carbon • Elbow Material: Steel with Advanced Coatings • Shaft Material: Stainless Steel • Integral Manual Emergency Operation • Single Rotor Installation up to a max of 20 Tonnes • CAN Bus Operation • NMEA Interface with Raymarine

Installation of a DMS MagnusMaster

Testimonials, recommended for anyone on open water, elling yachting and dms holland, installation of a dms arg, first dms magnusmaster in the us, sailing on big water is not exciting anymore, a great product from a reliable company, operation is easy and you hear nothing, with the stabiliser on, you can just leave the coffee on the table, without dms, a round of uk was impossible, the dms magnusmaster functioned flawlessly.

Natural Balance

Comfort is a feeling., our technologies will make you discover the wonder of balance., enjoy the sea, discover our products.

Fin Stabilizers

Steering systems

COMPACT FIN STABILIZERS

For yachts starting from 12m (40 ft) LOA up to 40m (130 ft)

ARGO: the clever ride control system

ARGO ride control combines the stabilisers and rudders action for an optimal course stability improving comfort, safety and fuel efficiency.

STABILIS ELECTRA

The first and unique stabilizing system with electric actuator: a world of advantages for owners and shipyards. EU Patent n.2172396

DUALIS ELECTRA

Wide range of bow thrusters with electric transmission and dual counter-rotating propellers. Surprisingly low volumes and weights

DUALIS HYDRO

Wide range of bow thrusters with hydraulic transmission and dual counter-rotating propellers. The reliability of established technology

Electrically actuated rudder system that allows for independent operation along with seamless integration with any autopilot or joystick system

CAPTAINS FEEDBACK

Feedback on cmc marine from Captain Ramazan Dogan on azimut Trideck

Cap Riccardo Venturi San Lorenzo Yacht 86 SL sub eng

Captain Fernandez M/Y Ironman Benetti

Testimonials.

“Integrating a large number of complex electrical systems required a lot of work in advance, and then considerable care in construction. With the electrical systems we found some very important allies. The stabilisation system developed and manufactured by CMC Marine allowed us to create a platform that is perfectly stable in all conditions, including at zero speed. Thanks to the high efficiency of CMC’s systems, we were able to use smaller fins, contributing to the hydrodynamic efficiency.”

"CMC Marine system, actually, is the perfect one and I’m very happy to have it on board. The system is working perfectly and it is very friendly to use; the big advantages are no noise, no hittings, no alarms, no hydraulic pumps. Actually the low electric power is enough to stay with one generetor overnight at anchor. This is why I really like CMC Marine stabiliser system."

“The optional CMC Marine zero speed stabilizers were definitely a smart add-on, avoiding the pendulum effect you often find on many flybridges."

“Capt. Maresca is pleased with the electric stabilizers that give the boat the stability of a 50-meter, but allows her to maneuver like a 20-meter”

“We have installed CMC SE160 type with 350HS fin type to a 50m motoryacht last year. She had a succesfull season. Less vibration, noise and service costs made the owner happy. We have cleared around 2 cubic meter pumps valve groups piping  from the old system and cleared space in the engine room. This winter we have checked all releated works on the boat and withness no problems. Thank you for introducing us your  electric type stabiliser systems.”

"In an evolving world CMC Marine remains in a leadership position, where electrically-actuated stabilizers are widely accepted and sought after, and manufacturers must offer solutions which are more finely tailored to the Clients’ needs and have an higher degree of integration with related yacht systems.”

"Talking about the maintenance, the boat is just one year old and now we are just checking the prechecks and the annual services. The maintenance has been very easy until today; if you compare with the other systems it is really friendly."

“To compensate for the higher centre of gravity, the shipyard has simply added more ballast low down in the hull and fitted two electric CMC Marine dynamic stabilizers that reduce roll by more than 80% when cornering into the swell”

“I’m on board on So' Mar bringing she to Bodrum. […] Both thrusters and stabilizers performs very well. Captain is very happy with the thrusters. Underway stabilizing is great. Zero speed mode is amazing as well! There is no threatening hydraulic noise at all. Thank you for the efforts and the great system.”

“To maximize onboard comfort and reduce energy use, the boatyard has equipped My Paradise as well as all Benetti Class models with a CMC Marine electrical fin stabilizer. Compared to traditional systems, the electrical fin stabilizer ensure reduce noise, increase functionality, reduced electricity usage, and ease of maintenance."

"Whether dominating in design or paving the way in engineering, Italian craftsmanship remains at the forefront of innovation. A new dimension to this theory is CMC Marine, offering a stabilzer system that answers all the desires and demands of any superyacht client looking for total ease at sea.”

LATEST NEWS

CMC Marine at the Genoa Boat Show 2023

Cascina, September 2023 CMC Marine at the Genoa Boat Show continues to tell the Full-Electric story by bringing along its entire product range, always one step closer to innovation and [...]

CMC Marine at the Cannes Yachting Festival 2023

Cascina, September 7, 2023 At the Cannes Yachting Festival 2023, CMC Marine unveils its new communication campaign and presents its groundbreaking role in full-electric stabilization systems. CMC [...]

CMC Marine at Discover Boating Miami International Boat Show 2023

Cascina, February 2023 CMC Marine at the Discover Boating Miami International Boat Show 2023 After the shows in Düsseldorf and Seattle, CMC Marine continues its world tour and will be one of over [...]

Stabilis Electra, Covered by EU patent n. 2172394, is the world’s unique revolutionary system offered by CMC Marine to overcome the problem of limited dynamics of a hydraulic actuator.

Discover all the world’s top yachts that have chosen Stabilis Electra

Our customers

Stay up to date on our Products, News, Events and more.

Sign up for the newsletter now.

I have read and accept the terms and conditions

Start typing and press Enter to search

Privacy Overview

• Yacht Broker
• Yacht Types
• Last Minute BVI Yachts
• One-Way Offers
• Short-Term Offers
• Crewed Yacht Search
• Crewed Charter Info
• Crewed Yacht Charter Contracts
• Why a Yacht Charter?
• Frequently Asked Questions
• Yacht Charter Etiquette
• Seasickness, Prevention, Cures
• Yacht Stabilisers prevent Seasickness
• Charter vs Cruise
• Yacht Charter Sailing Destinations
• Skippered  & Bareboat Yacht Search
• Bareboat Charter Info
• Bareboat Terms
• Bareboat FAQ’s
• Award-Winning Yachts
• Yacht Insurance Basics

The Science Behind Yacht Stabilisers: How They Prevent Seasickness

Welcome to the world of yacht stabilisers – the ultimate solution to prevent seasickness and enhance your boating experience.

As professional yachtsmen, we understand the importance of a smooth and comfortable journey, and that’s why we’re here to introduce you to the benefits of yacht stabilisers.

Seasickness can ruin your boating experience, leaving you unwell and unable to enjoy the beauty of the open water. But with yacht stabilisers, you can say goodbye to motion sickness and hello to a more enjoyable voyage. Here’s how:

• Improved Stability – Yacht stabilisers provide improved stability on the water, reducing the rolling and pitching motion of your boat. This results in a smoother and more comfortable journey, even in rough sea conditions.
• Increased comfort – Yacht stabilisers help to create a more relaxed atmosphere onboard, as they reduce the boat’s motion and keep you feeling steady on your feet. This enhances the overall comfort of your journey, making it more enjoyable for everyone onboard.
• Enhanced safety – With improved stability, yacht stabilisers increase safety on board, reducing the risk of injury from falls or slips.

Most yachts have stabilisers while cruising and at anchor, which means the yacht won’t rock. If you are prone to seasickness, please ask your Charter Broker to find you a charter yacht with stabilisers. Yacht stabilisers are fins or rotors mounted beneath the waterline and emerging laterally from the hull to reduce a yacht’s roll due to wind or waves. This technology will make cruising and time at anchor more enjoyable, especially for those prone to seasickness.

What are the stabilizers on a yacht?

The following types of stabilisers are available:

Gyroscopic (gyro) stabilisers

Gyroscopic stabilizers, also known as gyro stabilizers or simply gyros, are mechanical systems used on yachts and other vessels to reduce rolling and improve stability in rough seas. They use spinning masses (usually flywheels) to counteract the boat’s motion and keep it stable. The gyro operates by sensing the boat’s rolling motion and then using hydraulic or electrical actuators to apply a counter-force to counteract that motion. The spinning flywheels create a gyroscopic effect, which helps dampen the boat’s rolling motion. Gyroscopic stabilizers can be especially beneficial for yachts exposed to rough or choppy seas, as they can help to provide a smoother, more comfortable ride. They can also help reduce the wear and tear on the vessel and its equipment and improve safety for passengers and crew.

Fixed fin stabilisers

Fixed fin stabilizers are a type of stabilization system used on yachts and other vessels to reduce rolling and improve stability in rough seas. They work by using underwater fins attached to the vessel’s hull and are designed to create lift in response to the boat’s rolling motion. The fins are positioned perpendicular to the waterline and are located near the centre of gravity of the boat. When the boat rolls, the fins create lift on one side of the vessel, which helps to counteract the rolling motion and keep the boat stable. Fixed fin stabilizers can effectively reduce rolling and improve stability, particularly in moderate to heavy seas. They are relatively simple in design and are typically less expensive to install and maintain than other stabilization systems, such as gyroscopic stabilizers.

Retractable fin stabilisers

Retractable fin stabilizers are a type of stabilization system used on yachts and other vessels to reduce rolling and improve stability in rough seas. They work by using underwater fins attached to the vessel’s hull and can be extended or retracted as needed. The fins are positioned perpendicular to the waterline and are located near the center of gravity of the boat. When extended, the fins create lift in response to the rolling motion of the boat, which helps to counteract the rolling motion and keep the boat stable. When not used, the fins can be retracted into the vessel’s hull, reducing drag and allowing for easier manoeuvring. Retractable fin stabilizers offer the flexibility of being able to extend or retract the fins as needed, depending on the sea conditions. They are typically more expensive to install and maintain than fixed fin stabilizers.

The RotorSwing Magnus

The RotorSwing Magnus is a type of stabilization system used on yachts to reduce rolling and improve stability in rough seas. It is a variation of the traditional gyroscopic stabilizer system and is designed to provide improved performance compared to other stabilization systems. The RotorSwing Magnus system uses a spinning rotor to create a gyroscopic effect, which helps to counteract the boat’s rolling motion and keep it stable. Unlike traditional gyroscopic stabilizers, the RotorSwing Magnus system has a unique design that allows the rotor to move freely in response to changes in the boat’s motion, providing improved stabilization performance compared to other systems. One of the benefits of the RotorSwing Magnus system is that it requires less space to install compared to traditional gyroscopic stabilizers, as the rotor can be mounted in a compact, low-profile housing. This can be an advantage for yachts and other vessels that have limited space for stabilization equipment.

Zero-speed stabilisers

Zero-speed stabilizers are a type of stabilization system used on yachts and other vessels to reduce rolling and improve stability while the vessel is stationary (at anchor) or at slow speeds. They work by using underwater fins attached to the vessel’s hull and are designed to create lift in response to the boat’s rolling motion. Zero-speed stabilizers can be particularly useful for yachts that spend much time at anchor or in port and can provide improved comfort and stability in these situations. They are typically less expensive to install and maintain than other stabilization systems, such as gyroscopic stabilizers.

Latest trends in yacht stabilizers from Dockwalk.

These stabilisers are a great way to reduce the rolling and pitching on a yacht and reduce seasickness. Therefore ask your yacht charter broker to get you a yacht with stabilisers to ensure a more comfortable sail.

Videos demonstrating stabilisers:

We consistently push boundaries to produce equipment of the highest standards required by the world’s most demanding environments. It’s why, worldwide, we are the maritime industry’s first choice in motion control systems.

We supply cutting-edge motion control systems to all key markets across a wide variety of hull forms, vessel sizes, speeds and applications.

Luxury Yachts

Our groundbreaking stabilization and multi-axis ship motion control solutions have been designed to deliver maximum comfort for yachts.

Commercial Ships

When return on investment is the key driver for your enterprise, our advanced sector-leading ship motion control systems always deliver.

Military Vessels

Mission-critical operations demand the highest standards of motion control. It’s why Naiad Dynamics is trusted by more than 55 of the world’s navies

Total Ride Control®

Hydraulic stabilizers, electric stabilizers, hydraulic systems.

Naiad Dynamics provides a full array of services from the early planning stages of a project, to thru-life support and maintenance.

Simulation & Prediction

Engineering, manufacturing, installation, commissioning, maintenance & repair.

Naiad Dynamics traces its roots back to the earliest days of automated ship stabilization. View some of the significant events in our history that define who we are today.

The Naiad Dynamics team blends the knowledge of seasoned industry experts with the fresh perspectives of young professionals

“You really can’t go wrong with Naiad. You ask them to stabilize your boat, and they’re able to do it with solid products, friendly service and 25 years later the systems still work.” -

Request a quote

Have a question? Our experts can guide you toward the best solution for your needs and budget.

• We Are Hiring
• Naval Architecture
• Installations
• Seakeeper Extended Warranties
• Naval Architecture, Engineering & Construction

• All Speed 24VDC Fins Pricing
• Interceptor Pricing
• All-Speed Fin Stabilizer

Custom-Shaped

Jetboats stabilization.

• Stabilization
• Marine Electronic Innovations
• Yacht Management
• Antifouling Coatings
• Air Conditioning & Refrigeration
• Fiberglass, Gelcoat, & Paint
• Mechanical & Electrical Services & Repairs
• Haul Out & Dry Dock Services
• Schedule Demo Boat Ride
• Starboard Yacht Interactive Assessment
• Marine Electronics
• Seakeeper 1
• Seakeeper 2
• Seakeeper 3
• Seakeeper 5
• Seakeeper 6
• Seakeeper 9
• Seakeeper 16
• Seakeeper 18
• Seakeeper 26
• Seakeeper 35
• Fins & Interceptors

Seakeeper & Humphree "Dealer of the Year" Awards for 2021

Every boat is different, but Humphree always makes a difference.

Humphree creates compact, customizable fins and interceptors to trim and stabilize vessels, efficiently enhancing boat performance and transforming your experience at all speeds . Together, Starboard and Humphree make the impossible possible for all in Fort Lauderdale, FL.

• Roll, Pitch, & Yaw Movements
• Drag & Resistance
• Size & Weight
• Fuel & Power consumption

All Speed Fin Stabilizer

Innovative solutions for a dynamic environment

The All Speed Fin Stabilizers offer cutting-edge stabilization both underway and at anchor in various sea conditions.

With the touch of a button, Humphree’s fully electronic, low-power, user-friendly controls allow you to automatically optimize your boating experience through dynamic stabilization without draining your battery bank or needing to run your generator.

Able to rotate through 360°, these lightweight fins respond instantly to detected swell conditions and significantly reduce roll and pitch motions, prevent anchor walk, and enhance overall safety and comfort.

So peaceful, you may just forget that you left the marina.

• 360-degree rotating fins
• Solid, customizable construction
• 24-V DC Powered
• Carbon Fiber for low drag and weight
• Flange-Mounted with external servomotor
• Ultra Fast and Quiet Servo Motor
• Integrated Technology and Automation
• Operates at zero speed and underway to reduce roll, pitch, and yaw motions, so you can comfortably anchor in nearly any anchorage
• Able to be cut to custom fit any hull, with five size options for twin or quad installations
• Low energy consumption so there’s no need to start the generator
• The sleek fin design allows for maximum stabilizing effect with minimal drag for improved fuel consumption
• The flange mount allows for easy installation
• Fins are designed to break in the event of grounding, keeping the hull and servo undamaged
• Able to be combined with Humphree interceptors for a complete automatic stabilization experience

All-Speed Fin Features

Click on each feature to learn more.

All-Speed Fins are specially designed to be easily customized to nearly any hull.

The unique Fin flange mount design minimizes grounding damages and eliminates the need for costly repairs.

Rotation capabilities enable the All-Speed Fin to gently pull your anchor to prevent anchor-walking, minimize uncomfortable movements, and transform your experience, whether you’re underway or at anchor.

All-Speed Fins are perfectly sized so that you can eliminate drag and resistance on nearly any vessel.

Humphree’s Fin vs Hydraulic Fins

• The Humphree Fin system is the lightest weight and most hydrodynamic system on the market today
• The Humphree fin system was designed with efficiency and low drag in mind with different fin for all types of vessels
• Smaller footprint and Surface than competitive Fin stabilizers
• No hydraulics means low maintenance and easy installation

Interceptors

Humphree interceptors are designed to create lift by “intercepting” the water as it flows over the hull with retractable blades mounted on the transom. By introducing this vertical plane into the hull profile, the intercepted water flow results in a corrective force on the transom to lift it to the boat’s optimal trim angle—getting it beyond the “hump” to planing for faster acceleration at lower RPM and fuel consumption.

By design, interceptors provide the same amount of lift with less resistance and drag than traditional trim tab systems, making them a wise choice for fast, high-planing vessels.

Features & Benefits

• Robust construction, lightweight composite materials
• 24V DC powered servo-motors that won’t drain your batteries
• Externally mounted & customizable to fit nearly any hull
• Programmable with Humphree adaptive technology for stability at any speed and sea state
• Optimal trim angle results in lower fuel consumption and higher speed

Interceptors Features

Whether you operate a center console with outboards, a mega-yacht with a swim platform, or a high-speed waterjet yacht, Humphree has an Interceptor Series to suit your needs and fit your transom.

Our customizable Humphree interceptor trim tab systems minimize roll and pitch movements no matter how fast you go . These compact interceptor installations offer more than stability, acting as trim tabs to improve your speed , acceleration and visibility with minimal fuel and power consumption. For high speed rides, Humphree interceptors are your yacht stabilizer.

Humphree’s transformational Interceptors are 25% more efficient than traditional trim tabs:

• Heightened speed
• Faster acceleration
• More compact & lightweight
• Less resistance & drag
• Automated technology options

Designed for boats 25’-60’ length overall, the X-Series is available in five standard sizes. For superior control of dynamic hull motions, they all have an interceptor blade with a powerful 50mm (2”) stroke

Humphree’s H Series line denotes a customizable interceptor for various transom designs and durable construction for vessels over 40’. Available in sizes 350-1500mm in width.

This interceptor line with an asymmetric placed servo unit can be used if the preferred area of the transom is limited or when a structure on the inside of the transom does not allow for a center-placed servo. The HA-interceptor can be custom shaped for a perfect fit and comes in sizes 500 – 1100mm.

The HE-Series interceptors are designed for heavy-duty use. With their powerful 75mm stroke length, they will add 50% more lift force than the standard 50mm interceptors. The HE-interceptor comes in sizes 750 – 1500mm wide and can be custom shaped for a perfect fit.

HL-Series are designed and built for large and heavy-planing vessels. With a mechanical, high-performing structure, the HLS-interceptor’s blade has a powerful 110mm stroke length. The HLS interceptor is available from 800mm to 1500mm in width

All H-Series Interceptors can be custom shaped for your unique vessel to remain flush with each curve and contour of the hull when not in use, and apply lift when needed for peak performance and stabilization.

User-Friendly Automation

Humphree Interceptor systems include advanced sensor technology and an adaptive algorithm to monitor vessel motion and respond instantly to get rid of uncomfortable movement. Its easy-to-use Control Panel allows the operator to simply set it, forget it, and enjoy the ride.

Humphree Stabilizer packages can be customized to include the following upgrades for a completely automated stabilization experience:

Automatic Trim Control

Standard to every Humphree control system, Automatic Trim Control flawlessly adjusts your vessel’s trim angle at all speeds to optimize performance, and reduce the plowing effect of the bow wave. This means faster acceleration, decreased fuel consumption, and greater visibility from the helm.

Automatic List Control

Effectively reduces your vessel’s list angle to maintain a safe and comfortable ride on an even keel, regardless of your vessel’s load condition.

Coordinated Turn Control

Intelligently executed turns using a combination of rudder, gyro, and accelerometer inputs to reduce heel angle and comfortably tighten your vessel’s turning radius for safer, more effective maneuvering at any speed.

Active Stabilization

Synchronization of all Humphree system components to continuously deliver the smoothest experience in the ever-changing boating environment.

Add automatic control systems to your Humphree interceptor, and drive your vessel into the future.

Smart technology in the form of automatic systems allows Humphree interceptors to detect sea conditions and immediately respond with total accuracy, keeping your vessel steady and giving you infinitely greater control as you turn, drive, and ride.

These Humphree additional options maximize your experience and your passengers’ safety:

Waterjet propelled yachts are light, fun, fast, and highly maneuverable, but with their impeller and rotating bucket system of propulsion and steering, many operators find that staying on a straight heading requires constant corrections. Humphree Fixed Fin and Interceptor Steering combination offers the solution to keep you on track.

Interceptor Steering (for waterjet-propelled vessels)

With their light displacement and shallow draft, jetboats are known for their poor course-keeping abilities. Humphree’s Interceptors use adaptive technology to automatically apply or remove lift as required to keep your vessel on a straight heading, reducing the need for constant corrections, and greatly increasing its fuel savings. Combine this technology with Humphree Fixed Fins for even greater directional stability.

Humphree Fixed Fins offer a lateral component to the hull of high-speed and shallow-draft vessels, such as a waterjet boat, enhancing its course-keeping ability. Install these fins near the stern and experience the difference as they limit the sideways motion (snake wake) of the propulsion thrust.

With its sleek, streamlined design, the fixed fin is sub-cavitating for boats with operating speeds up to 40 knots and has base-ventilating fins for boats achieving speeds greater than that.

Combine with the Humphree Interceptors to experience superior control and performance at any speed.

• Composite material for strength and corrosion resistance
• Hydrodynamic design for low drag and improved course-keeping
• 4-Bolt installation designed to shear off if the vessel should run aground, protecting the hull from damage

Fixed Fin Features

Course-keeping is a major challenge for vessels like waterjet boats. The Fixed Fin is bolted to the aft of the hull, acting as a lateral area to keep vessels on course.

Fixed fins are specially designed to be easily customized for nearly any hull.

The bolts have been tested and verified to break off and keep the hull intact to limit the damage to the boat in the event of collision or grounding.

The wing profile minimizes uncomfortable yaw movements with minimum resistance.

Will Humphree Stabilizers work for your boat?

The expert teams at Starboard can custom install state of the art Humphree stabilizers on the exterior of any vessel in the proper size range. For Humphree interceptors, that’s 23 feet in length or larger, while for Humphree Fins, that includes vessels between 39 and 165 feet in length.

Which combination of Humphree systems is best for you?

Humphree stabilizers have been successfully installed on thousands of vessels to date, we have the hard predictive and performance historical data to determine which combination of Humphree systems is best for you. Check the Humphree sizing guide or provide us with the year, make, and model of your vessel to explore what works for your boat and your needs.

Humphree Sea Trials—See the difference.

Rendering of the Humphree stabilization in motion.

Actual footage of the Humphree stabilization at anchor.

Humphree Fins—Tailored to Transform

Get the Humphree experience for yourself.

Humphree’s academy.

Humphree’s Academy is an owner’s and captain’s resources portal where you have access to instructions on how to calibrate and set up your Humphree’s systems.

Thank You! Your message has been sent.

Thank you your application has been received., privacy overview.

Quantum Stabilizers

• Quantum Hydraulics
• Technical Specifications
• Control Systems
• Parts & Tools
• Product Videos
• Training Videos
• Model Testing/R&D

General Inquiry Form

Contact Name *

Company (if Applicable)

Your Position

Builder & Hull Number

Description of how we can help?

REQUEST FOR INFORMATION

Thank you for your message! We will contact you soon.

Marine Stabilizers – Zero Speed™ and Beyond

Since 1985, Quantum has been perfecting the Art of Stabilization . To date, Quantum has installed 1,000’s of stabilizer systems and 85% of yachts over 55m use Quantum’s Zero Speed™.

With a focus on innovation and cutting edge marine technology, the engineers behind Quantum Stabilizers have raised the bar for vessel stabilization systems.

Quantum Zero Speed ™ Stabilizers were introduced in 2000 and proved to establish Quantum as a leader in the industry.  The enhancement of Zero Speed™, redefined the marine industry, for those who had previously suffered from seasickness.  That technology was soon followed by the XT™ Fin, MAGLift™ Rotor and Dyna-Foil™ proprietary technologies.  Today, Quantum is the preferred stabilizer choice for the large luxury yacht market, military and other commercial vessels. 

Quantum Patented Marine Stabilizer Systems

XT Fin™ Ship Stabilizers

Dyna-Foil™ Retractable Stabilizers

MAGLift™ (Magnus Effect) Rotor Ship Stabilizers

Privacy overview.

Necessary cookies are absolutely essential for the website to function properly. This category only includes cookies that ensures basic functionalities and security features of the website. These cookies do not store any personal information.

Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. It is mandatory to procure user consent prior to running these cookies on your website.

Smooth Seas Ahead with Quantum's Stabilizing Solutions

Posted January 29, 2024 in Lifestyle by Ashleigh King

The luxury of being out on your own private yacht provides a sense of security, comfort and exclusivity. While the seas can be unpredictable, selecting a yacht that is equipped with proper stabilizers is crucial to ensure relaxation and safety throughout your journey. With an unwavering dedication to innovation, Quantum Marine Stabilizers specializes in tailored solutions to enhance vessel performance, comfort and safety, offering benefits across the critical aspects of yachting. Their stabilizers are designed to minimize the rolling motion, and ensure a smoother and more stable ride, which contributes to increased comfort for yacht owners and charter guests.

Beyond comfort, stabilizers play a crucial role in improving safety by reducing the risk of accidents caused by excessive rolling, maintaining stability and control. Overall, the result is increased seaworthiness, making yachts equipped with Quantum Marine Stabilizers well-suited for diverse sea conditions, a critical feature for long-distance voyages and charters, especially in areas with unpredictable weather and sea states.

We’ve gathered a selection of yachts available for both sale and charter that are equipped with Quantum Marine Stabilizers.

If you’re interested in  buying  or  selling a yacht , contact the professional team of yacht brokers at Northrop & Johnson today. As a world-leading yacht brokerage, Northrop & Johnson offers access to thousands of luxury  yachts for sale  around the world, including private yachts not publicly advertised for sale. From yacht sales to new construction, contact our team of  yacht brokers  to get the results you need.

Up Next in Lifestyle

Proud to be part of the MarineMax family

© 2024 Northrop & Johnson

RotorSwing Fin Stabilizer Multi ZeroSpeed

Based on the Patented ZeroSpeed from the RotorSwing rotors, the Fin will be also available with full ZeroSpeed functionality, a unique feature in this size of fin stabilizers. The smooth movements of the servo-motor driven gearbox will optimize the roll damping at anchor or adrift.

A truly great expansion in our product line. A new design based on many years of roll damping experience. This RotorSwing Fin Multi stabilizer is a multi-functional roll damping system that is extremely quiet and also adaptive while fighting almost any type of motion and ocean. Safety first; our roll damping systems automatically retract while going astern or neutral.

Main Benefits

• 100% Electric
• Both Underway and ZeroSpeed version
• High Performance at High Speed
• Performance at ZeroSpeed
• Low Resistance
• Silent Operation
• Low Maintenance
• Increased Comfort, Safety & Relaxation
• Removable Fin possibility
• Low Power Consumption
• Unique In-House Made High Efficient Gearbox

Get in contact

Let’s us call you, vessel data form.

RotorSwing will calculate a recommended system specification based on the vessel data provided in this form.

Below you can find the digital versions of our latest brochures and technical data sheets. Click on the button to view the digital version of a file.

Let's get in contact

Reach out now.

Industriestraat 7C 6361 HD Nuth, Holland

Office hours

Monday: 07:00 – 18:00 Tuesday: 07:00 – 18:00 Wednesday: 07:00 – 18:00 Thursday: 07:00 – 18:00 Friday: 07:00 – 18:00

Tel: +31 (0)45-5659390 Mob: +31 (0)653305277 Email:  [email protected]

Subscribe to our newsletter

Development by Sjok-king

• RotorSwing 140 Underway
• RotorSwing 140 Multi ZeroSpeed
• Rotorswing Fin Stabilizer Underway
• Rotorswing Fin Stabilizer Multi ZeroSpeed
• Testimonials

Log in or Sign up

You are using an out of date browser. It may not display this or other websites correctly. You should upgrade or use an alternative browser .

rmjranch Member

General thoughts on Zero Speed Stabilizers, from people who have been on boats with them. #1 Do they work? #2 Noisy? #3 Reliable? #4 Great or not so great? #5 Brand, if that is allowed on this forum. Any and all information greatly appreciated, including the SIZE of the boat you were on. Thanking you in advance.

Capt Bill11 Senior Member

rmjranch said: ↑ General thoughts on Zero Speed Stabilizers, from people who have been on boats with them. #1 Do they work? #2 Noisy? #3 Reliable? #4 Great or not so great? #5 Brand, if that is allowed on this forum. Any and all information greatly appreciated, including the SIZE of the boat you were on. Thanking you in advance. Click to expand...

Capt Ralph Senior Member

Justin also knows CPR; for when you hear the price..

Capt J Senior Member

I only worked on one yacht that had them. a 160' Delta, I believe they were trac, not positive. They did a great job, we didn't hear them at all even down in the crew area's (lowest living spaces in the yacht. As for the expense, if you have to ask the price then you can't afford it. hehehe

C4ENG Senior Member

#2 noise. The actual movement of the fins through the water is not noisy. A lot of times there is a bed on top of the fin actuators (where the hydraulic rams are moving the fins) and who ever sleeps in that bed will hear a dampened swish noise all night. The hydraulics of the system can get noisy through the boat if the nitro filled noise suppressor looses some of its charge. They do need to be charged every year (or at least checked). Quantum is what I am most experienced with. And they are reliable when you do what the manufacture suggest in ways of maintenance. 150 to 200 ft vessels. The worst thing about zero speed stabilizers is once you are accustomed to having them, it's horrible with out them

K1W1 Senior Member

rmjranch said: General thoughts on Zero Speed Stabilizers, from people who have been on boats with them. Click to expand...

Fishtigua Senior Member

Quantum, the Zero Speed people, are a Guernsey based company. Their offices are just up the road from me. I've worked on 2 boats with them fitted and, to be honest, couldn't tell if they were on or off. I suppose, over many years, that I've become immune to the feeling of any rocking and rolling aboard. Now if my beer were to ever start to spill.....................? Zerospeed | Quantum Med Marine

Hi, Fish, This is the HQ and incorporates one of the most well known and respected Stabiliser Gurusin the shape of Peter Florence and where most of the R and D is done although they have been doing some with Delft University for the last 2 yrs which has caused a major rethink in why some of this stuff works. Stabilizers | Integrated Systems | Quantum Marine Engineering

HTMO9 Senior Member

Rolling stabilisation For displacement or semi displacement hulls, I would sign all statement above. TRAC systems for boats up to 100 / 130 ft and Quantum for almost everything bigger. For much larger steel boats, for example in the 3000 GT range, I personally would go for the fully retractable zero speed fins from Blohm & Voss Industries. But from personal experience gained in the last year, for fast planning hulls up to 500 GT, I would go for gyroscopic antiroll stabilisation, either in single or multiple configuration. But only with the Seakeeper systems and not with the noisy devil in the box, Mitsubishi ARG systems. The most interesting zero speed stabilisation system using hydraulic fins, I have seen on a yacht, that was built in the very northeastern part of the Med. The system was only powered by main engine driven PTO pumps .

HTM09 said: ↑ For much larger steel boats, for example in the 3000 GT range, I personally would go for the fully retractable zero speed fins from Blohm & Voss Industries. Click to expand...

HTM09 said: ↑ From Blohm & Voss Industries. Click to expand...

KIWI your a correct, they take some internal volume for their pockets. And you got me on these Quantum stabilizers. I saw them, when I walked through the floating dock at B&V with Eclipse in it but I did not really noticed them and later forgot to ask. Are these the onces that can be seen on this picture of Ecplipse in dock ? How effective are they in comparison to the retractable fins? When I remember correctly, Eclipse had four of them.

Attached Files:

Eclipse in dock.jpg.

HTM09 said: ↑ How effective are they in comparison to the retractable fins? Click to expand...

Milow232 Guest

K1W1 said: ↑ Hi, The biggest drawback with them is they are limited to a top speed of somewhere around 16/17kts. Click to expand...

Speed limit on stabilizers Retractable stabilizers extend backwards towards a mechanical stop and held open by the flow of water. The faster the ship goes, the smaller the movements of the fin, same as on rudders on aircraft. They are strong enough for higher speeds and still work at higher speeds but only in one direction because of its hydrodynamic profile. The principle of the new Quantum MAGLIFT retractable stabilizers is based on the "Magnus effect". Which means, the air flow around the side of a rotating cylinder, which rotates with the flow, is greater than on the other side causing a slight pressure difference. This creates lift. This phenomena is used for roll stabilisation. In addition, besides its bidirectional rotation, the cylinder moves forward and backwards during its rotation to create this kind of lift during zero speed situations. But this effect will die during higher boat speeds and the cylinder will only have an symmetrical flow around it, the lift will be destroyed within the boundary layer and because of its head resistance, the extended cylinder gets counter productive and it is better to retract them. When you look at the animated videos, it seems funny, how this cylinders paddle around during their zero speed work but they really seem to work. I do not believe, they have to be retracted, because they are unable to withstand the waterpressure at higher boat speeds but because of their greater angle of movement beyond the rectangular position, they have to be positioned by hydraulic force and not by a mechanical stop. The vertical Flettner Rotor (for example used on the E-ship 1) uses this Magnus Effect to add in propulsion of a ship. The fuel saving have been up as high as 25 %, using these rotors on that cargo vessel. But on this vertical rotors, big endplates (like winglets on a/c) increase the effiency remarkably. These endplates would not work on the stabilizers because of their additional freedom of movement. The above mentioned Magnus effect should not be mistaken with the Coandă effect, which is far more complicated (to explain) in the 3D world. I hope, my limited command of the english language could explain this complicated subject a little bit. Magnus effect:

Magnus_effect.JPG

E-ship1.jpg.

HTM09 said: ↑ I do not believe, they have to be retracted, because they are unable to withstand the waterpressure at higher boat speeds but because of their greater angle of movement beyond the rectangular position, Click to expand...

Aerodynamics This complicated subject makes comming back my nightmares from university in the night before an exam, when the last things in my brain before falling asleep, were Mr. Magnus, Mr. Coandă, Mr. Bernoulli, Mr. Flettner and Mr. Boyle–Mariotte and their friends with all their rules, laws and formulars . " Chemistry is bang and smell and physics never work ", old saying from students since centuries.

• No, create an account now.
• Yes, my password is:
• Forgot your password?