| 摘要 |
PURPOSE:To measure an anchor position of the sea bottom or the river bottom by a collimation from the coast by hooking with a wire an anchor part of a rack base for supporting a weight, and a display buoy provided vertically with a buoy needle on the top part. CONSTITUTION:A bottom position display buoy consists of an anchor part 1 installed to the seam bottom, and a display buoy 2 for displaying a position by projecting a buoy needle onto the sea surface, and both of them are hooked by plural wires of an equal length. Also, the enchor part 1 consists of a rack base 11, a weight 14 and a horizontal boarf 15, and the reack base 11 is structured so that a top plate 12 is supported by leg parts 13, 13, and the horizontal board 15 and the weight 14 are suspended through a neck lever 16 from the upper surface and the lower surface, respectively, in the engaged part of about the center of the top plate 12. In this way, the needle itself is inclined along an inclination of the wire, and an anchor position of the sea bottom or the river bottom can be measured by a collimation from he coast. |
