To establish a secure link while remaining 100 metres underwater, submarines could transmit photons of laser light to satellites, for retransmission to base.

当潜艇地100米海底时，要建立安全的通信链路，把光子激光发射到卫星上去，再由卫星转发回基地。

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Acoustic similarity is the base of scaled model tests of underwater structure noise.

声学相似性是水下结构噪声模型试验的基础。

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The experience of underwater blocking construction of deep river swell with big sand bags at Longxue Ship-Building Base in Nansha is presented.

介绍南沙龙穴造船基地深水河涌水下大砂袋封截的施工经验。

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In March, police chiefs proposed the merger of West and South Yorkshire and Humberside Police's underwater search units into one base, halving the number of police divers across the region.

BBC: Policemen on horses