GSF Development Driller II is a fifth generation, Vanuatu-flagged dynamic positioning semi-submersible ultra-deepwater drilling rig owned and operated by Transocean. The vessel is capable of drilling in water depths up to with drilling depth of , upgradeable to . Development Driller II was deployed in drilling a relief well on the Macondo Prospect to stop the oil spill caused by the explosion and subsequent loss of Deepwater Horizon. References External links Transocean official website Development Driller II current position at VesselTracker 2004 ships Drilling rigs Semi-submersibles Ships built in Singapore Transocean