moored surface buoy An unmanned instrumented platform operating on the surface of the water column loosely tethered to the seafloor to maintain a fixed position (e.g. ODAS buoy). 2013-08-20 13:53:41.0 SDN:L06::41 SDN:L06::41 SDN:L06::41 2 2 2013-08-20 13:53:41.0 accepted false