| 摘要 |
PURPOSE:To make it possible for a vessel to travel in an arbitrary direction by arranging three elevatable legs movable in a vessel body longitudinal direction, an only elevatable leg, and two elevatable legs movable in a vessel body transverse direction, respectively. CONSTITUTION:A dredging ladder wale 19 opened in its forward direction is provided on the center of the vessel body front half part, and a dredging ladder 13 rotatably mounted. On the side and back parts of the dredging ladder wale 19, two and one elevatable legs 6, 3 movable in the vessel longitudinal direction are respectively arranged in order, while on the back part of the vessel body and on the side part of the front part of said body, one only elevatable leg 2 and two elevatable legs 9 movable in the vessel body transverse direction are respectively arranged in order. And, a dredger is moved to an arbitrary position to perform a dredging job by repeating the elevation and movement of each of the legs 2, 3, 6, 9. |
