Siem Offshore is the latest offshore support vessel operator to report reduced red ink during 2018 as markets begin a recovery.
The Oslo-listed company's net loss attributable to shareholders was $48.9m for the full year, compared to a loss of $71.2m in 2017.
This is equates to a net loss of $0.05 per share in 2018, compared to $0.08 in the previous year.