a floating deepwater drilling platform that is towed to a desired location and then partially flooded for stabilization and usually anchored [n]
self-propelled barge that is mounted on partially submerged legs supported by underwater pontoons, rides at anchor, and serves as a work base and living quarters in deep offshore drilling operations
of, for, or pertaining to a semisubmersible
being a floating deepwater drilling platform that is towed to a desired location and then partially flooded for stabilization and usually anchored