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How Do Submarines Communicate Underwater?
The former refers to extremely low-frequency waves (ELF), which are used during deep dives because they can penetrate hundreds of feet below the water's surface. On the other hand, the latter are ...
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Chinese scientists create a ghost radar moving at ‘near-light-speed’ to detect submarines
These extremely low-frequency (ELF) electromagnetic waves have the capability to penetrate seawater, making it possible to detect submarines hiding hundreds of metres beneath the surface.