AUTOMATIC SELF-SINKING BUOY

PURPOSE:To easily discover a buoy in the bottom of the sea by detaching a buoyancy structure, provided in the outside of a buoy main unit, from the buoy main unit or by destructing an external machine body of the buoy main unit, and eliminating buoyancy of the buoy main unit, so as to prevent an obstacle from being given to navigation of a ship. CONSTITUTION:An automatic self-sinking buoy 11 is floated in the seawater by buoyancy generated by a buoyancy structure 12 and an external structure 14, and action of a data transmitting part 45, GSP receiving part 46 and a data memory part 43 is started, to transmit an observation data stored in the data memory part and a data of showing accurate time, fed from the GPS receiving part 46, relating to a communication satellite. When a command of starting action is given to a self-sinking control part 44 from the data memory part 43, a control signal of commanding separation is fed to a buoyancy material mounting fixture 13 by the self-sinking control part 44, and the buoyancy structure 12 is disconnected from a hard hat 18 by the buoyancy material mounting fixture 13. In this way, buoyancy given to a buoy main unit 15 is only the buoyancy generated in the external structure 14, to sink the buoy main unit 15 into the seawater.