| 摘要 |
A semi-rigid pneumatic boat ( 1 ) comprising: a rigid hull ( 2 ) defined by a rigid underwater hull ( 3 ) closed on the top by a rigid floor ( 4 ) and bordered on two sides by two pneumatic floats ( 5 ); a ballast ( 8 ) arranged in the rear part of the rigid hull ( 2 ) and pumping means for filling it with water or emptying it thereof; two pneumatic chambers ( 10 ) defined in the respective rear parts of the two floats ( 5 ) and pneumatically isolated from the rest of the floats; means ( 12, 13 ) for inflating and means ( 14 ) for deflating the rear chambers; the boat having no rear board; thus, by filling the ballast ( 8 ) and by deflating the rear chambers ( 10 ) the boat is nosed up, with its rear part submerged and a load ( 25 ) may be brought closer, against the floor ( 4 ), and then by emptying the ballast and re-inflating the chambers ( 10 ) the boat is set afloat, supporting the load ( 25 ).
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