| 摘要 |
<p>A sea bed anchor of the plug-and-socket type, in which the depth of the socket (2) needed to keep the plug in the socket against tidal force is reduced by downwards force from a hydrofoil (5). The same force is used to lock the plug and socket positively together. The effective area of hydrofoils (5) can be increased when the tide is flowing, and reduced when it is not. Downwards force from hydrofoils is also used to enable submersible vessels to drill sockets in rock or to embed suction anchors in sediment.</p> |
