DK Group develops and markets fuel saving technologies for ships using air lubrication systems. They have developed the Air Cavity System Super Micro Bubble Generator (ACS/SMBG) which uses air bubbles inside the boundary layer of a ship's hull to reduce frictional resistance and improve efficiency by 5-10%. Full scale trials of their ACS Demonstrator vessel confirmed efficiency savings from their model tests. DK Group is working to refine their SMBG system with further tank tests and plan to install the first SMBG system on an Aframax tanker within the next year.