A sound made by tapping on the hull of a shop will be reflected from the sea bottom, and depth of the sea at that point can be calculated.

在船体外壳上敲打发出的声音会从海底反射。通过测量敲打与接受回声的间隔时间，这一点的海底深度就可计算出来。

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Model tests for this hull lines are conducted at different water depth in towing tank, and the effect of shallow water on craft performance is investigated.

针对该型线又进行了不同水深的阻力模型拖曳试验，并根据试验结果讨论了高速艇的浅水效应。

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Model tests for this hull lines are conducted at different water depth in towing tank, and the effect of shallow water on craft performance is investigated.

针对该型线又进行了不同水深的阻力模型拖曳试验，并根据试验结果讨论了高速艇的浅水效应。

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