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A semi-submersible platform is a specialised marine vessel used in offshore roles including as offshore drilling rigs, safety vessels, oil production platforms, and heavy lift cranes. They have good ship stability and seakeeping , better than drillships .
Semi-submersible platform, which is typically transported to a location where it is placed in service Oil platform , a large structure with facilities for well drilling to explore, extract, store, and process petroleum and natural gas, in deeper water (more than 1,500 metres (4,900 ft)), the semisubmersibles or drillships are maintained at the ...
A semi-submarine, taken out of the water. A semi-submarine (semi-sub) is a surface vessel that is not capable of diving, but has accommodation space below the waterline featuring underwater windows. [1] The watercraft is similar to glass-bottom boats, but with deeper draft. Both types of boats are mainly used to provide sight-seeing trips for ...
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This evolved into two models of Taedong semi-submersibles, the B and C models, which were exported to Vietnam and Iran. The Taedong–C is a semi-submersible variant of the IPS-16 Peykaap torpedo boat. [4] North Korean semi-submersibles have been intercepted while making incursions into South Korean waters. [5]
A submersible is an underwater vehicle which needs to be transported and supported by a larger watercraft or platform. This distinguishes submersibles from submarines , which are self-supporting and capable of prolonged independent operation at sea.
By 1958, the number of submersible drilling rigs had increased to around 30. [2] In 1961, Shell Oil successfully converted an existing submersible rig Blue Water Rig No.1 into the first semi submersible drilling unit for operation in the Gulf of Mexico when it was found to have good stability and motions whilst being towed at a partial draught. [3]
An Expeditionary Transfer Dock (ESD), formerly the Mobile Landing Platform (MLP), is designed to be a semi-submersible, flexible, modular platform providing the US Navy with the capability to perform large-scale logistics movements such as the transfer of vehicles and equipment from sea to shore. These ships significantly reduce the dependency ...