Deutsche Offshore Schifffahrt has held a first steel cutting ceremony at CSSC Huangpu Wenchong Shipyard in China for DO Joule, the lead vessel in a new class of construction commissioning service operation vessels ordered by Schoeller Holdings. The first delivery is scheduled for May 2027, with the remaining four sister vessels planned to follow at three-month intervals, creating a tight handover cadence that suggests a deliberate push to scale fleet availability quickly.

 

Operating Model and Fleet Management Structure

 

Columbia Shipmanagement will take on technical management for the class, while DO will act as developer, operator, and commercial manager. This split indicates an approach that separates day-to-day technical oversight from the commercial and operational deployment strategy, with the goal of standardising performance across identical vessels while keeping commercial control centralised.

 

Design Philosophy Built Around Modular Versatility

 

Designed by Salt Ship Design, the C CSOVs are configured for versatility across offshore energy projects, using a modular concept intended to support work throughout the project lifecycle. The stated goal is to enable one platform to cover multiple phases, from construction and commissioning to operations and maintenance, reducing the need for different vessel types as work scopes shift and allowing operators to redeploy the same asset across different projects and clients.

 

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Access, Positioning and Aviation Capability

 

The vessel class is specified with a motion-compensated gangway described as having a very wide operational envelope, enabling access to platforms between 12 and 30 metres above the waterline. High DP capability is paired with a HiPAP hydroacoustic positioning system to support precise station keeping and subsea work in demanding conditions. A 12.4 tonne helicopter deck adds logistical flexibility for crew transfer and urgent mobilisation, particularly for projects located further offshore or operating under tight weather windows.

 

Deck Layout, Lifting Flexibility and Technician Capacity

 

The design emphasises offshore workability through a low freeboard, modular railings, and features intended to support installation, maintenance, and repair activity, including ROV deployment and a removable daughter craft system. Each vessel has 800 square metres of clear deck area, and a main crane that can be reconfigured within 48 hours between a 50 tonne active heave compensated configuration and a 10 tonne 3D motion compensated mode. Accommodation is designed for up to 95 technicians, indicating a focus on supporting larger commissioning and intervention teams and reducing personnel shuttling during intensive offshore campaigns.