The GustoMSC OCEAN Series brings together semi-submersible designs for offshore drilling operations. From tender-assisted drilling with the OCEAN400-TD to harsh-environment deepwater drilling operations with the OCEAN1100-HE, the series offers designs for a wide range of offshore needs. The OCEAN1100-HE’s hull is designed for low-motion characteristics and optimum station-keeping, supporting stable drilling operations. Learn how the OCEAN-series can support your field requirements.
Capabilities across the OCEAN-series
The GustoMSC OCEAN-series includes semi-submersible designs for drilling, tender drilling, and well intervention. The OCEAN400-TD provides tender-assisted drilling alongside deepwater structures and shallow-water production drilling, with mooring options for a range of operating depths. The OCEAN1100-HE is designed for harsh-environment drilling in water depths up to 1,500 m, with a low-motion hull and flexible station-keeping options, including DP3, thruster-assisted mooring and/or full mooring. Designs can be customized to owner requirements.
Designed for offshore performance
OCEAN400-TD
Tender-assisted drilling configuration, with mooring options for midwater and deeper-water operations.
OCEAN1100-HE
Hull optimised for low motion in harsh environments, with station-keeping options: DP3, thruster-assisted mooring or full mooring.
OCEAN series
Designs customizable to owner requirements.
High variable load and large deck area.
Why the OCEAN series
Designs for different offshore needs
The OCEAN-series includes semi-submersible solutions for drilling, tender drilling, well intervention.
Options for station keeping
Select an arrangement suited to the design and operation, from tender-rig mooring systems to DP3 and moored configurations.
Customization to owner requirements
OCEAN-series designs can be tailored to project and owner-specific requirements.
Find the right OCEAN design for your field
Tell us about your operating environment, water depth and drilling requirements.
Our team can help identify a suitable OCEAN design and discuss customization options.
Engineering Services
Operational support and engineering consultancy, helping customers enhance operations, push boundaries, and maximize asset returns.

Why partner with GustoMSC
With decades of offshore experience and a proven track record of innovation, GustoMSC helps clients unlock the full potential of their assets through smarter designs, life extension, and future-ready solutions that deliver safe, efficient, and sustainable performance.