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Length Overall 84.2 m
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Length (Submerged Hull) 81.0 m
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Breadth 32.0 m
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Depth 20.8 m
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Operating Draft Range 8.0 m - 11.0 m
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Heavy Lift Draft 13.0 m
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Power 17,280 kW
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Speed 10.5 kn
The Compact Semi-Submersible (CSS) concept has been developed by STX Marine, in partnership with Hallin Marine to capture the capabilities and low-motion behaviour of a semi-submersible vessel in the smallest form feasible, giving an industry-leading design in terms of operability. The CSS Derwent’s primary functios will be well-intervention, well-stimulation, and subsea installations. The Derwent brings the superior seakeeping and operability of the CSS design to the light well intervention and subsea service roles. Design features include:
- Working deck area of 1300 m2, with 1500 T deck cargo capacity.
- 160 T heave-compensated Module Handling System, deploying subsea equipment through a 7.5m x 7.8m work moonpool.
- 150 T heave compensated offshore crane
- Moonpool and side-launch work-class ROV systems
- DP-3 and DP-2 capability
- Accommodation for 42 crew and 110 client personnel