With 20-year experience in the offshore wind market we have developed our 10 FOB SWATH semi-submersible vessels. Our goal is to have the best personnel and vessels, using our experience to provide reliable service. Approved by DOCISO 9001, 14001, 45001, Achilles, Environmental Policies, GDPR, Danish Authority and DNV.


The vessels have two lower hulls built for stability and speed. The pitching, rolling, and slamming are reduced due to vessel design with ample distance from seawater to the water deck. Our vessels with exceptional large water jets, each supplying 3000 litres of water per second, are a great improvement for manoeuvring together with the vessels automatic moveable foils. Change from CAT to submerged mode (SWATH) or vice versa takes about 2 minutes. In the rough sea and submerged mode, our vessels movements are considerably reduced, which provides safety and comfort for all on board.


Our unique patented bow fender with moveable clamps used on the outside of the turbines docking poles keeps the vessels secured in the correct position and allows service personnel to use the “landings” in up to 2 m Hs. Our Fob Swath vessels achieve 40 to 50 more working days per year than regular crew transfer vessels.



  1. Fob Swath (FS) vessels have the following speed: FS 1 = 18 knots, FS 2, 3, 4, 5, 6 & 7 = 22 knots, FS 8 = 27 knots, FS 9 and 10 = 35 knots and if one propulsion unit should fail, they continue with 25 knots. 
  2. Sailing same distance, fuel consumption for our 32.5 m vessels at 33 knots is similar to our 25 m vessels at 22 knots. They can be powered with HVO(B100) or GTL fuels, reducing CO2 emissions up to 90%.
  3. Our vessels with a length of 32.5 m have Dynamic Position (DP), used among other while vessels receive or deliver fuel and electricity.
  4. Acceleration in accordance with the High-Speed Code 2000, with vertical acceleration under 1 G, lowest sea sickness index 0.75 to 1.25, comfortable and safe seating and sound level below 60 decibels. Change from CAT to SWATH mode or vice versa takes about 2 minutes. Improved performance provides additional working days.
  5. FS 8, 9, & 10 are approved with seats and life-saving appliances for 55 industrial personnel (IP) and have deck space of 75 m2. FS 1 to 7 approved with seats and life-saving appliances for 24 IP and deck space of 35 m2. We can provide accommodation vessels for 12 IP each with single cabins including WC. shower etc., plus 10 IP for day sailing.
  6. If one of our vessels needs service, one of our available vessels may take its place.
  7. Our vessels have a hydraulic operated rescue net, which ensures the rescue of persons with one deckman.
  8. FS 8, 9 and 10 have a hydraulic operated gangway, and all our vessels have cargo cranes.
  9. Our workshop have considerable spare parts and complete engines and gears.

Offshore Windservice A/S
+45 97 88 80 00 – Office
Nordsøkaj 51, 7680 Thyborøn.
Billy T. Kristensen – +45 50 80 04 79

 Odfjell Wind AS
+47 55 21 50 00
Nygaardsgaten 114, 5008 Bergen. 
Fredrik Odfjell – +47 55 12 10 10

ASSOCIATED COMPANIES: Odfjell Eiendom AS, Bergen, Norway, has long term investments in real estate with over 150 000 m² of commercial properties, part owners in custom-built tankers for the Bahamas, ice-classed tankers for the Baltic Sea and special vessels for the Offshore wind industry.

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