| 摘要 |
Semi-submersible vessels are described comprising one or more modules each comprising a sealed chamber of annular cross-section, a partially immersable support structure secured to the chamber and a platform or deck carried by the support structure. The support structure is preferably comprised by a network of tubular members and preferably the sealed chamber comprises a plurality of toroidal storage reservoirs and ballast tanks. The support structure and chamber can together be in the form of a truncated ovoid narrow end uppermost. In an alternative embodiment the chamber is in the form of an inverted bowl and receives a dome like storage reservoir therein. |
