Vantage Drilling International, a Cayman Islands exempted company, is an international offshore drilling company focused on operating a fleet of modern, high specification drilling units. Our principal business is to contract drilling units, related equipment and work crews, primarily on a dayrate basis to drill oil and natural gas wells for our customers. Through our fleet of drilling units, we are a provider of offshore contract drilling services to major, national and independent oil and natural gas companies, focused on international markets. Additionally, for drilling units owned by others, we provide construction supervision services for rigs that are under construction, preservation management services for rigs that are stacked and operations and marketing services for operating rigs.
A jackup rig is a mobile, self-elevating drilling platform equipped with legs that are lowered to the ocean floor until a foundation is established for support, at which point the hull is raised out of the water into position to conduct drilling and workover operations. All of our premium jackup rigs were built at PPL Shipyard in Singapore. The design of our premium jackup rigs is the Baker Marine Pacific Class 375. These units are ultra-premium jackup rigs with independent legs capable of drilling in up to 375 feet of water, a cantilever drilling floor and a total drilling depth capacity of approximately 30,000 feet.
Drillships are self-propelled and suited for drilling in remote locations because of their mobility and large load carrying capacity. While all of our drillships are dynamically positioned and designed for drilling in water depths of up to 12,000 feet, with a total vertical drilling depth capacity of up to 40,000 feet, the Platinum Explorer, Titanium Explorer and Tungsten Explorer are currently equipped to drill in 10,000 feet of water. The drillships' hull design has a variable deck load of approximately 20,000 tons and measures approximately 781 feet long by 137 feet wide. All of our drillships were built at Daewoo Shipbuilding & Marine Engineering shipyard in South Korea.