SHIP SAILING OBSTRUCTION DEVICE

摘要

PROBLEM TO BE SOLVED: To certainly obstruct the sailing of a suspected ship when an obstruction preparation is made and to obstruct non-sailing of the ship after a predetermined time is passed from the time when the obstruction preparation is made. SOLUTION: The obstruction device is provided with a buoy 2 and a lanyard 3 supported to this buoy 2 and preventing a sailing by floating it on a water surface WS or in underwater near the water surface and twining around a ship. A connection rope 4 for releasing the obstruction preparation by sinking down this lanyard 3 is provided at the stage when a predetermined time is passed from the time when the obstruction preparation is made by floating the lanyard 3.