An anchor-handler owned by NorSkan Offshore, Dof's Brazilian unit, has won a one-year contract extension with Petrobras.
The 16,820-hp Skandi Fluminense (built 2007) will continue its employment with the Brazilian state energy company until September 2020.
The initial contract began in July 2018.
The vessel has one work-class remotely operated vehicle (WROV) on board, which is operated by Dof Subsea.
AIS data shows the Skandi Fluminense has been active in the past month between the port of Macae in Brazil and the Santos basin, off the country's south-east coast.