| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a diving rope drop display device capable of quickly and rationally performing search activity of using a diving rope, capable of reducing a burden of an acting diver, and capable of improving a safety management measure. <P>SOLUTION: This device displays, on the water, a drop position of the diving rope into a target water area, and includes a floating body 2 of floating on the water, a weight 3 to be landed at the bottom by dropping in the water, and a sounding rope having one end connected to the weight 3 and having the another end wound on the floating body 2. The floating body 2 is constituted so that rotational resistance by the water becomes large against the direction of rotation caused by rolling-out of the sounding rope on the water. <P>COPYRIGHT: (C)2013,JPO&INPIT |
