Semi-submersible design - A new generation of offshore accommodation vessels

摘要

This paper explores the naval architectural design considerations involved in a new fleet of offshore accommodation semi-submersibles constructed by different owners in the period from 2008 to 2018. The principal design features are compared with data from the previous generation of floatels constructed in the 1970s/80s. All fourteen vessels are compared at a high level, and in some areas detailed data from six of the new vessels (three different design classes) is analysed. Information is provided on subjects such as weight estimation and weight control, motions and station-keeping behaviour, resistance and propulsion. Key arrangement considerations are discussed together with practical design data on internal volume and deck area.