Zupt’s highly accurate Inertial Navigation System (C-PINS) and specialized buoy setting tool reduces the amount of time required to position a buoy pattern on the seabed prior to spudding a new well, placing a new subsea structure, or installing a monopile. Our methodology requires that the ROV team positions a single tool to provide precise locations for the four corner marker buoys to be placed. The tool is easily removed without disrupting the buoy markers and has a convenient, easy-to-access C-PINS receptacle.