Norwegian OSV owner Dof has posted a larger loss in the third quarter as impairments hit the fleet.

The net deficit to 30 September was NOK 2.13bn ($232m), from NOK 269m in the same period of 2018.

It booked an impairment charge of NOK 917m, versus NOK 124m a year ago.

Revenue rose to NOK 2.05bn against NOK 1.73bn.

"The fair market valuations have dropped slightly for some of the oldest part of the fleet, and been stable for the rest of the fleet during the...