| 摘要 |
<p>The invention relates to a ship's hull (1) having a cargo deck (2) which is located adjacent a waterline (A) and which is intended to carry a number of barges and a control space (3), etc., wherein the cargo deck is open towards the stern of the vessel. The hull interior accommodates one or more ballast tanks (7) and means (8) required to empty and to fill 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 (10) functions to generate an air flow which can be delivered to the outer surfaces (side or bottom surfaces) of the hull by means of a pipe system (11) which discharges beneath the waterline. At least a part of the lowermost surface region (1b) of the hull is flat and extends horizontally. Arranged within this region is a downwardly open cavity (14) of small height and large surface extension, wherein the pipe system (11) 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.</p> |
