Maersk Viridis

A pioneering feeder solution to unlock the next chapter of offshore energy

Designed to enable offshore feeder docking, the WTIV Maersk Viridis operates with purpose-built feeder vessels that ferry the WTG components out from port. This enables the WTIV to remain on site, carrying out uninterrupted installations.
This bespoke feeder solution can operate anywhere in the world – including in the U.S.

About Maersk Viridis

Designed for efficiency and safety

Delivered in March 2026, Maersk Viridis is the world’s first WTIV with a built-in docking bay, enabling her to remain at the wind farm for the duration of the installation period and take delivery of the WTG components offshore.
This way, no time is lost in transportation, and installations can continue uninterrupted.
This is the first integrated feeder spread designed to enable fixed-to-fixed transfer of components at sea, making the process faster and safer by eliminating the need for dynamic lifts.

Purpose-built feeder vessels

Transport barge and pusher tug with articulated coupling system

Two sets of ATBs (Articulated Tugs and Barges) have been custom-built to dock at the Maersk Viridis and ensure a continuous supply of components to the WTIV.
The ATBs’ smaller size and draft enable broader port access, from smaller, shallower marshalling points to ports behind bridges, locks or hurricane gates.

How is the Maersk feeder solution different?

A fully integrated marine spread for offshore wind installation, the WTIV Maersk Viridis operates together with purpose-built feeder tugs and barges, working together as one system.

Step 1

Port loadout

The purpose-built feeder spread of ATBs (Articulated Tugs and Barges) collects turbine components from port.

Their size enables them to access smaller and shallower ports, and to pass hurricane gates and bridges.

Step 2

Docking at the Maersk Viridis

The feeder vessels ferry the turbine components from port to site.

Here, they dock securely at the jack-up WTIV Maersk Viridis, enabling a fixed-to-fixed component transfer from feeder to WTIV, rather than with a floating crane/barge.

Step 3

Uninterupted installations

Maersk Viridis remains on location to receive components and carry out continuous installations.

A detailed look at the offshore docking system

How does the Maersk feeder-stabilising technology work?

  • The feeder spread docks at the WTIV, Maersk Viridis – and can do so in up to 2.5m waves (Hs).
  • The locking system engages, ‘pushing down’ the barge into the water to fully stabilise it.
  • Once fixed in place, the cargo frame is elevated to the WTIV deck for load out of the turbine components.
  • The locking system retracts, releasing the feeder vessel.  Once the turbine components have been loaded out, the feeder vessel will return the empty cargo frame to port to collect the next set of WTG components.
  • The tower, nacelle and blades are assembled by crane. Maersk Viridis remains on its critical path, permanently stationed at the windfarm carrying out uninterrupted installations.

Vessel specifications

WTIV Specifications

  • Built to install the next generation of 20+MW turbines
  • Equipped with a 2,000t crane
  • Capable of stable WTG component transfer in ≤2.5m waves (Hs)
  • Operational in water depths of ≤60m
  • Can operate globally, including in the US

Feeder vessel (ATB) specifications

  • Capacity: 1x full set of 20+MW WTGs
  • Transit speed: 6kn at 3mHs
  • Tug power: 8,000 BHP
  • Barge optimised to limit WTG tower accelerations
  • Built by Bollinger Shipyards, US
  • Owned by Edison Chouest Offshore