DOF Group boss Mons Aase expects the severe downturn in offshore vessel markets to last "long into 2021".

Speaking on the shipowner's second-quarter webcast, the chief executive said day rates for platform supply vessels (PSVs) in the North Sea are at or below operating expense levels, with no real upturn in sight.

"We expect quarter three to be okay, and of course there is more uncertainty in quarter four, but hopefully we will win a few more jobs," he said.