Norwegian developer Olympic has ordered two commissioning service operation vessels (CSOVs) from Ulstein Verft, with options for a further two vessels.
The vessels have hybrid battery propulsion and are prepared for methanol fuel to enable zero emissions.
They are based on the Ulstein SX222 design with Twin X-Stern from Ulstein Design & Solutions.
Olympic is a player in the maritime cluster on the north-west coast of Norway.
It has previously built six vessels at Ulstein Verft and was the first customer of Ulstein Design & Solutions.
Olympic chief executive Stig Remøy said: “For us, it will be crucial that the vessels are delivered on time and at the right quality, and this is what Ulstein Verft is known for.
“This means we can meet our customers’ demands and get the vessels into operation at the agreed time.
“The Twin X-Stern is a smart concept, optimised for low energy consumption.
“During operation, the offshore wind service vessels stay positioned at the turbines most of the time, and with the main propellers fore and aft, these vessels will reduce the energy requirement to a new level when on DP.
“As a shipowner in the Norwegian maritime cluster, it is important for us to invest in this cluster.
“With a shipyard, ship designer, suppliers and Vartdal Invest as a co-investor, this is a project with a strong local ownership.”
Ulstein Group chief executive Cathrine Kristiseter Marti said: “We are excited to be working with Olympic again, an important and innovative player in the Norwegian maritime cluster and a company that we have had the pleasure of working with for many years, through many complex and successful projects.
“With the current challenging economic and political climate, these contracts are a result of a pragmatic and good cooperation between the parties, where both parties have gone to great lengths to find good and viable solutions.”