Single buoy mooring (SBM) or Single point mooring (SPM) are loading buoys anchored offshore and serve as a mooring point for tankers to (off)load gas or fluid products. They are the link between the geostatic subsea manifold connections and the weathervaning tanker. The main purpose of the buoy is to transfer fluids between onshore or offshore facilities and the moored tanker. They are capable of handling any size ships, even very large crude carriers (VLCC) where no facility is avaiable.