| 摘要 |
<p>A floating, semi-submersible offshore structure comprises at least three mutually connected legs which are spaced a distance of at least twice the largest cross-sectional dimension of the legs and adapted to contain ballast at their lower ends to increase the stability of the structure, as is conventional in semi-submersible vessels. However, the structure according to the present invention has a draught in operation which is at least twice the maximum wave height in the waters for which the structure is designed. </p> |
