Houston-headquartered Rowan has exercised its option for the construction of a third GustoMSC P10000 design ultra-deepwater drillship by Hyundai Heavy Industries (HHI) with the delivery scheduled for Q4 2014.
Rowan said the vessel will cost some $600million.
The agreement with HHI also includes an option, exercisable in February next year for a fourth drillship of the same specification for delivery in H1 2015.