What we do
Integrated subsea services

Integrated subsea services

Integrated subsea services, whenever and wherever you need them. Our expert team’s global experience in offshore operations deliver reduced project risk, increased efficiency and improved safety performance.

Our services

Integrated subsea & marine services for seamless project delivery.

Floating Offshore Wind Services (FLOW)

As a global leader in Floating Offshore Wind (FLOW), DOF supports the development of floating wind farms with specialist capabilities across design, transport, installation, and maintenance. Our work on flagship projects like Hywind Tampen demonstrates our proven expertise in delivering complex floating wind transport and installation (T&I) scopes, floating wind mooring, and dynamic cable installation.

Port & Marine Logistics for Floating Wind

  • Full floating wind transport and installation solutions using dynamic positioning (DP)-enabled vessels.
  • Logistics planning for turbine blades, towers, and floating wind anchors.
  • Real-time weather monitoring, safe loading and secure sea transit which meets environmental and safety standards.
  • Station keeping systems for deep-water stability.

Turbine Integration & Marshalling

  • Port-based integration of floating offshore wind turbines
  • Receipt, Unloading and Management.
  • Logistics tracking and load-out coordination

Early Engagement & FEED for FLOW

  • Front End Engineering Design (FEED) studies for floating wind turbine mooring systems, anchor layouts, and offshore cable laying.
  • Concept design of station-keeping, anchoring, and cable routing.
  • Lifecycle cost optimisation to support floating wind feasibility.
  • Technical, environmental and regulatory risk assessment and mitigation.

Transport and Installation (T&I) and Subsea Operations

  • AHV towing and hookup using engineered mooring systems for offshore floating installations.
  • Bespoke floating wind installation plans based on seabed data.
  • Remotely Operated Vehicle (ROV)-assisted operations and dynamic positioning.
  • Floating wind turbine mooring system deployment with real-time feedback.

Dynamic Cable Installation & Repair

  • Turnkey solutions for dynamic cable installation in floating offshore wind.
  • Route engineering, tension control, and seabed trenching.
  • Cable loading via carousels or reel drive systems.
  • Offshore wind cable repair and subsea cable recovery.

Anchor & Mooring Installation

  • Custom-engineered floating wind anchor solutions, including drag anchors and pile.
  • ROV and DP-assisted anchor placement.
  • Digital tension monitoring for floating wind mooring operations.
  • Reduced offshore installation time and environmental risk.

Fixed Offshore Wind Services

DOF supports fixed offshore wind farm developments with advanced cable installation, subsea construction, and responsive repair services. Our modular, mobile spreads and experienced team ensure efficient and safe delivery of essential subsea scopes.

Offshore Cable Installation for Wind Farms

  • Complete end-to-end offshore wind cable installation solutions from engineering and procurement to complete installation, including IAC, HVAC, and HVDC
  • Cable Laying Vessel (CLV) fleet with 7,000te dual concentric carousel for efficient cable laying offshore
  • Shallow water and beach landing capabilities for shore applications
  • Pull-in, trenching, and secondary steel integration

Subsea Cable Repair Services

  • Rapid mobilisation with mobile modular cable lay and repair spread
  • Pre-engineered procedures to reduce Mean Time To Repair (MTTR)
  • Fault-finding coordination with testing and termination partners
  • Subsea cable repair and offshore wind cable repair delivered via DOF or third-party vessels

Subsea Construction for Fixed Wind

  • ROV and Autonomous Underwater Vehicles (AUV) -supported seabed survey and preparation
  • Trenching and ploughing support for buried cable routes
  • Secondary steel installation to remove load from jack-ups
  • Infield grouting support services using large construction vessels

Why Choose DOF for Offshore Wind Projects?

DOF is your trusted partner for both floating offshore wind and fixed offshore wind developments. Our full-scope services cover marine, port, subsea and cable operations. Wedeliver seamless, integrated execution from FEED to installation and long-term maintenance.

With deep expertise in station-keeping systems, dynamic cable installation, offshore cable laying, and mooring systems for offshore floating installations, we bring unmatched technical capability and delivery confidence to every project. Our work on Hywind Tampen and other leading floating projects highlights our ability to deliver complex scopes safely and efficiently.

Certified under F4OR and ISO standards, and with operational hubs across the UK, EU, APAC, and Americas, DOF provides regional presence with global capability. Whether you're constructing today's wind farms or planning the next generation of floating offshore wind turbines, we’re ready to support your success.

Talk with one of our specialists or fill out the contact form

General Contact

For general inquiries.

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Thank you for your interest in DOF. If your inquiry did not match any of the categories that we provide, please write a short summary of your inquiry, where you are located, and your contact details, and we will send your inquiry to the best fit resource in our organisation. Please note that, due to privacy laws in multiple countries, DOF does not handle CV’s or job applications through this form and any job-related inquiry will be deleted upon receiving it. Thank you for understanding.

DOF makes available a 3rd party supported “Ethics Helpline” for reporting serious concerns, including whistleblowing. Please visit our Ethics Helpline information page here: https://www.dof.com/who-we-are/hseq/whistleblowing

If this is an emergency, please contact the duty phone: +47 56 18 10 93. Otherwise, your inquiry will be sent to a DOF Corporate Communication responsible.

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