| 摘要 |
The invention relates to a device making it possible to use a boat's hull, regardless of whether driven by sail or by an engine, at high speeds, by elimination of the keel or projecting centreboards. It consists of a central hull 1 and two or more side arches (counters) 2 forming leeboards, with formation, when under way, of an air-filled cavity between hull and leeboards. <IMAGE>
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