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Stable working conditions

Vector Fins™

Stabilizers have one main purpose, to dramatically increase onboard comfort.

A vessel at sea is influenced by pitch, sway, yaw, or heave movements, but it is the roll of a boat that is by far the more dominant and uncomfortable motion. This is what all stabilizers systems work to reduce.


We hoped for 50% effect, dreamed of 70%,
and ended up getting 90% effect!

Ola Tønder, owner of Grip Shipping

Elimination of roll – at anchor and underway

You can't calm the sea, but you can manage the effect of it. And by a lot too. Sleipner's award-winning Vector Fins™ reduces a boat's roll underway by up to 90 percent, without significant speed loss or consequential extra fuel consumption. That's unique. But what's even more remarkable is that these innovative stabilizers also reduce roll at anchor – with an outstanding 70 percent. 


The numbers above are significant. Considering the fact, they are stating the difference between getting the job done or not. Seasickness reduction by Vector fins™ is rated to a whopping 97 and 90 percent underway and at anchor, respectively. Now that makes the sea a whole different workplace!

Award-winning Innovation

"It's a unique piece of engineering that will sit under the water and most people won't see!"

- Bill Dixon, Jury Chairman, Dame Awards

Vector Fins™ features

  • Up to 50% more efficient at anchor than flat fins
  • Up to 30% more efficient underway than flat fins
  • Up to 55% less side-effects than flat fins
  • 20-50% less resistance than other fins
  • Prepared for high efficiency in any speed
  • Designed for maximum strength and minimum weight

The technology behind the “calming” effect

Up until now, boaters have had to choose between stabilization underway or at anchor. Additionally, traditional stabilizers have not been able to satisfy the desired roll reduction without increasing fin size, resulting in adverse side effects such as reduced speed or increased fuel consumption. 

The fact that Vector Fins™ stabilizers have both aspects covered may sound too good to be true. But let us demonstrate what you get when combining innovative technology and some good old physics: The fins' shape redirects the force direction and operates in an up-and-down motion, unlike flat fins that work with forces parallel to the hull angle. Effectively, more of the force benefits roll reduction, and less is wasted on yaw and sway. 

By this multidirectional force angle, the leverage arm around the boat's rolling point also improves roll reduction by increasing the boat's physical resistance to water motion. Therefore with a smaller set of Vector Fins™, you will see improved results in drag, power consumption, internal space consumption, and mechanical load-bearing compared to a set of flat fins of greater size. Simply put, Vector Fins™ achieves more roll stabilization per fin size. 

A deeper dive into Vector Fins™

If you want to learn more about how Sleipner's Vector Fins™ work, you can click to expand the topics below:

More Vector Fins™ benefits

  • Increased vessel operation time
  • Silent operation
  • Designed and manufactured at our ISO-certified factory in Norway
  • Also suitable for retrofit
  • Unlike gyros, stabilization force increases with speed
  • Advanced hydrodynamic fin design
Retrofit of Vector Fins™ stabilizers
MS Hagbart Waage is an older rescue vessel rebuilt as passenger traffic in the rough seas of Western Norway. Skipper and owner Ola Tønder shares his experience with the system and the impact for both crew and passengers.

For more information about Vector Fins™ for commercial vessels, please
contact us.