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   [Boat Performance Improvement](/articles/boat-performance-improvement)# Hull Vanes Can Improve Performance

 Feb 19, 2025

 

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  var videoData = {"video_carousel_display":"inline","video_carousel":{"dealer_info":false,"items":[{"title":"Hull Vane - The solution to improve ships efficiency performance and seakeeping - courtesy of Hull Vane","image":{"src":"\/sites\/default\/files\/video\/thumbnails\/jm0OoDK-MElNDhPQBOInrL8LqbkpUG86Y1BWRodsNQA.jpg","alt":""},"url":"https:\/\/player.vimeo.com\/video\/1058394521"}]}};  ### ARTICLE COURTESY OF [IBI NEWS](https://www.ibinews.com/)

  

 

 

 

By Robert Wielaard

**Hull Vane BV of the Netherlands** has completed a pilot project with TotalEnergies, installing its transom foils on the French energy giant’s Fast Support Vessels. (FSVs). The project, lasting several months, cut CO2 emissions by 11%.

The Hull Vane is a submerged wing under the transom that cuts the overall pressure resistance of vessels. Hull Vanes go on many vessel types, from 10m to 108m – patrol and supply craft, passenger ships, recreational motor craft, naval ships, and superyachts. Some 85 Hull Vanes are in use. The ratio between new and retrofit units is about 50:50.

The pilot project was done on the Ava J McCall, a 59m (194ft) Fast Support Vessel. It transports goods and personnel to oil fields off Nigeria and is propelled by five waterjets with a combined power of just over 10,000kW. Before the project, hydrodynamic studies showed the Hull Vane would save around 10% in fuel use at 15 to 25 knots.

**The Hull Vane is a submerged wing** under the transom that cuts the overall pressure resistance of vessels

 ![Hull Vane](/sites/default/files/Hull-Vane-2-19-25.jpg)





### Transforming Vessel Efficiency

In its first decade, Hull Vane sold about 100 units, 60 on commercial and 40 on recreational craft. The Hull Vane is a horizontal wing that generates lift and forward thrust. The company said 2024 “was a banner year”.

**The Hull Vane sits underneath** the waterjets and does not extend the vessel’s draft, beam or length.

Upon completion, the trials on the Ava J McCall showed no effect on the ship’s Dynamic Positioning capabilities. The Hull Vane is a patented wing from the company that marked its 10th anniversary in 2024. It called 2024 “a banner year”.

On the Ava J McCall, the Hull Vane was placed beneath the waterjets and did not increase the vessel’s draft, beam or length. The fuel use data was compared with measurements after the last dry-docking, a year earlier, to erase the effect of cleaning and repainting the hull. Ava J McCall now uses 14% less at 16kt and 9% at 21kt, saving at least 250,000 litres of diesel per year.

“**We are constantly looking for ways** to reduce the carbon footprint of our operations, so the Hull Vane raised our interest,” said David Flajolet, marine specialist at TotalEnergies.

“The pilot project was a success. Contrary to most decarbonizing systems, the Hull Vane requires no active crew management, which is our key point. Its ability to be retrofitted for a limited cost and technical complexity make the solution a quick win for TotalEnergies.”

Worldwide, six FSVs are equipped with a Hull Vane. “All show fuel savings exceeding 10% over their operational profile,” says Hull Vane BV CEO Niels Moerke. “Hull Vanes have short payback periods ranging from one to three years for these vessels.”