Method and facility for assembling a plurality of floating wind turbines

A method for assembling a plurality of floating wind turbines, the method comprising:

• establishing an installation facility by arranging an installation vessel, having a crane, at a secluded place, as well as mooring a barge next to the installation vessel;
• transporting a plurality of turbine blades to the installation facility by a first feeder vessel;
• lifting the turbine blades, using the crane, onto the installation facility;
• transporting a plurality of tower sections to the installation facility by a second heavy lift feeder vessel;
• lifting at least some of the plurality of tower sections, using the crane, onto the installation facility;
• transporting a plurality of nacelles to the installation facility by a third feeder vessel;
• lifting the nacelles, using the crane, onto the installation facility;
• towing a first floating wind turbine foundation to the installation facility;
• erecting a tower on the first floating wind turbine foundation by assembling a set of the tower sections, using the crane;
• installing a nacelle on top of the tower, using the crane;
• installing a set of turbine blades onto the nacelle, using the crane, to make a first completed wind turbine;
• towing the first wind turbine away, making space for a second floating foundation at a spot where the first wind turbine was assembled;
• wherein the turbine blades are transported in cages and are lifted onto the barge;
• and
• wherein, where the barge and a deck of the installation vessel do not have sufficient space, lifting at least one of the set of turbine blades onto the barge, lifting at least one of the plurality of tower sections onto the deck of the installation vessel, and lifting at least one of the plurality of nacelles onto the deck of the installation vessel, such that remaining ones of the set of turbine blades, remaining ones of the plurality of tower sections, and remaining ones of the plurality of nacelles, respectively, remain on the first feeder vessel, the second heavy lift feeder vessel, and the third feeder vessel.