| 摘要 |
PCT No. PCT/SE95/00605 Sec. 371 Date Nov. 21, 1996 Sec. 102(e) Date Nov. 21, 1996 PCT Filed May 29, 1995 PCT Pub. No. WO95/32888 PCT Pub. Date Dec. 7, 1995A ship's hull has a cargo deck which is located adjacent a waterline and which is intended to carry a number of barges. The cargo deck is open toward the stern of the vessel. An interior of the hull accommodates one or more ballast tanks and a device for emptying and filling the ballast tanks with water, either completely or partially, thereby enabling the hull to be brought to a shallow draft waterline or to a deeper draft waterline. An air-compressing device generates an air flow which can be delivered to the outer surfaces of the hull by a pipe system which discharges beneath the waterline. At least a part of the lowermost surface region of the hull is flat and extends horizontally. Arranged within this region is a downwardly open cavity of small height and large surface extension. The pipe system discharges at least into the cavity. Air bubbles that are generated will also reduce friction against side-related hull surfaces, even when the hull heels steeply in heavy swells. |
