| 摘要 |
PURPOSE:To secure exact operations of a ladder type working ship by lessening the resistance of tidal current by a method in which front and rear pontoons are connected with a girder on the water surface, a vertically movable spud and a rocking ladder for working are provided to the rear pontoon, and the hanging rope of the ladder is coupled to the girder. CONSTITUTION:A front pontoon 15 and a rear pontoon 16 are connected with a girder 17 on the water surface. Vertically movable spuds 20 and 21 are provided to the back end of the rear pontoon 16, and a ladder 4 for seabed working is pivotally attached to the front end of the pontoon 16 through a trunnion 3 in a rocking manner. The other end of the rope of the ladder 4 is coupled to the winch 19 of the girder 17. By such a hull structure connected with the rear pontoon, the portion to be immersed into water of the hull can be lessened, the resistance of tidal current can be reduced, and therefore, exact operations can be secured even in the rough weather period. |
