The Sevan MODU is using the upper part of the main hull as a part of the “topside” structure. This upper section is carrying the main power generation plants, mudhandling systems, derrick and drilling equipment and storage for risers, drill-string, casings, etc. A large accommodation block is located in the “bow” section of the unit. The drilling operation is made through the centre moonpool. At this location the drilling riser and related equipment are well protected and the unit may safely operate even in areas with ice.
The station keeping of the MODU is based on a Dynamic Positioning (DP) system by use of azimuth thrusters. For operation in more shallow water depths a conventional wire based mooring system may be installed in combination with the DP system.