Norway's Wilhemsen Group is making a move into the offshore wind farm vessel market in a deal with compatriot shipowner Ostensjo Rederi.

The shipmanagement and vessel supply giant wants to fast-track the growth of Ostensjo's renewable energy company Edda Wind, which owns two purpose-built service operation vessels (SOVs) that maintain turbines.

Edda has two more SOVs on order, as well as two commissioning service operation vessels (CSOVs) for delivery in 2022.