By use of the strip theory, this method and the results may be used to predict the second-order wave forces on ships or some submersible platforms.

借助于切片理论，此方法和结果似也可用来预估船舶或某些半潜平台的二阶波浪作用力和二阶运动。

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They are semi-submersible heavy lift ships, which is to say that the ships are designed to be ballasted down so that their main decks go underwater, allowing their cargo to be floated aboard.

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Its primary business is the ownership and operation of jack-up rigs, tender rigs, semi-submersible rigs and drill ships for operations in shallow, mid- and deepwater areas.

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For these jobs, Mr Adair used support-and-rescue ships and semi-submersible fire-boats all of his own design.

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