| 摘要 |
PROBLEM TO BE SOLVED: To provide a safe and inexpensive self-sinking device of a buoy for saving a recovering cost by automatically self-sinking a drifting buoy and a mooring buoy completing the service life by losing the observing function, preventing an increase in a danger of sailing of a ship by the buoy becoming useless driftage and wholly eliminating a malfunction of being a high cost by particularly causing a danger like a conventional self-sinking device using a large quantity of gunpowder. SOLUTION: A hollow buoy body 2, an observing device housed in the buoy body, a power source 3 and this self-sinking device 4 are provided, and the self-sinking device has a plug member 15 filled in a hole 81 arranged in an outer wall of the buoy body, a plug member welding electric heater 16 arranged in contact in a plug member, a switch 17 for putting the power source and the electric heater in an electrically continuing state and a switch operating means 90 for operating the switch, and when the switch operating means operates the switch, the electric heater is heated by an electric current supplied from the power source, and the plug member is melted so that the hole is opened.
|
