In 2021 OHT will bring to market the largest and most innovative, custom-built offshore wind foundation installation vessel in the World. The 51,087 dwt semi-submersible offshore wind foundation installation vessel of Ulstein design, will feature a 3,000 t main crane.
Alfa Lift with a 10,000+ m² ‘smart deck, capable of carrying and installing up to 16 XL monopiles or 10 jackets per voyage, will be able to fully submerge the main deck to a depth of 14.66 m.
Free Deck Length: 148.4 m
Free Deck Area: 8,310 m² main + 1,800 m² fcstl
Accommodation: 100 people
Length over all: 217.88 m
Length p.p.: 204.26 m
Breadth moulded: 56 m
The versatile crane can lift and install a full range of offshore wind foundations including tall jacket structures, and the largest monopiles. The crane operates in two main modes, either with one main hook of 3,000 MT or with dual hooks of 2 x 1,500 MT. Monopiles are never held in suspension during installation. They are either in their storage position, in the deck mounted transportation system or in the upending tool which hands the monopile directly into the pile gripper frame.