Drydocks World has won its third contract from Singapore-based Hallin Marine to build a $110m compact semi-submersible (CSS) vessel.

The 8,200dwt CSS Derwent has been designed to repair and maintain an existing offshore well via chemical injection on braided lines and extending perforation tunnels, the company said.

The 84m-long vessel is equipped with a multiple inherent fail-safe capability and four Azimuth thruster units with DP-3 capacity enabling automatic as well as manual dynamic positioning and heading control.

The CSS will also have an offshore crane, an electro-hydraulic deep-water lowering system and two remotely operated underwater vehicle systems.