Answer: semisubmersible

AnswerCrossword Clue
semisubmersiblebeing a floating deepwater drilling platform that is towed to a desired location and then partially flooded for stabilization and usually anchored
semisubmersiblea floating deepwater drilling platform that is towed to a desired location and then partially flooded for stabilization and usually anchored
semisubmersibleof, for, or pertaining to a semisubmersible
semisubmersibleself-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