The first element of the Fehmarnbelt tunnel successfully immersed

Controllab is proud to have contributed to this success operation with our digital twin technology delivery to FLC.

After a multi-day operation, the first of the 217-metre-long tunnel elements for the Fehmarnbelt tunnel is now in place on the seabed. The historic event began late on Monday evening, 4 May 2026. Five tugboats and the special immersion vessel IVY transported the tunnel element from the tunnel factory at Rødbyhavn on the Danish island of Lolland to the immersion point off the Danish coast.

Once the immersion started, the first tunnel element was positioned precisely in the tunnel trench in front of the Danish tunnel Portal.  Subsequently, the element was connected to the portal using hydraulic arms.