Petrobras will keep the 5,100-dwt Skandi Santos (built 2009) in direct continuation from 1 March next year.

It is currently working a five-year deal that began in 2010.

The new charter is worth NOK 2.5bn ($387m) and includes installation of Petrobras' new generation of subsea trees.

The vessel is owned by DOF Subsea and leased to AKOFS, which owns and operates the topside and subsea equipment.