Sweden-based NOS has worked with MHO-Co to develop the vessels.
The CTVs will take around four hours to travel to site, from their base at the port of Grimsby, on the east coast of the UK.
The Hornsea 2 CTVs will also carry Z-Bridge’s newly developed motion compensated transfer system, called Bring-to-Work.
This transfer system will be installed as an additional feature for technicians to access the Hornsea 2 transition pieces directly from the CTV.
Orsted lead marine specialist Jan Stilling said: “The new CTVs have incorporated large battery capacity that makes it possible to stay offshore overnight in hybrid mode meaning they’re not burning fuel for up to eight hours while the vessels keep their positions without anchoring or mooring to a buoy.