IMO 9186792

Discoverer Enterprise is a fifth generation deepwater double hulled dynamically positioned drillship (ASTANO FPSO design) owned and operated by Transocean, capable of operating in moderate environments and water depths up to 3,049 m (10,000 ft) using an 18.75 in (47.6 cm), 15,000 psi blowout preventer (BOP), and a 21 in (53 cm) outside diameter (OD) marine riser. From 1998 to 2005 the vessel was Panama-flagged and currently flies the flag of convenience of the Marshall Islands. Discoverer Enterprise has two sister ships, Discoverer Spirit completed in 1999, and Discoverer Deep Seas completed in 2000. The ship was the first to offer a dual drilling derrick capability. The dual derricks allowed simultaneous operations to be performed, and according to Transocean increased efficiency by 40 percent. The US$360 million ship gives its name to the Enterprise class of large deepwater drillships.