A new GBS solution concept has been developed aiming to reach the following objectives: 

• Efficient construction rates of concrete structures by means of slip-forming methods. 
  
• GBS geometry must be easily scaled to fit within depth range in the wind farm. 
  
• It should be a self-buoyant solution to avoid the use of heavy lift vessels.
• Reducing weight over water line, lowering gravity centre and increasing naval stability. 
  
• The solution should be ballasted using only water, allowing:
  • Cost reduction.
  • Installation during the whole year
  • Decommissioning or re-floating if necessary.
    
• Minimization of the use of port area for construction and storage. 
  
• Transport of the wind turbine assembled on the GBS.
  
• No noise or pile driving. Environmentally friendly. 
  
• Low loads transmitted to the terrain. Adapted to large range of soil conditions.