Why seawater acts as a wall for standard radio signals
In short: Submarines cannot simply use Wi-Fi or standard radio to talk to the surface. Because water absorbs most common frequencies, these vessels must rely on specialized physics and distinct technologies to stay connected.
The video explains why underwater communication is a significant engineering challenge: seawater effectively blocks ordinary radio waves. To overcome this, submarines utilize different methods depending on their depth and specific needs.
Key technologies discussed include extremely low-frequency (ELF) radio for long-range signals and underwater acoustic communication for closer proximity. Understanding these distinctions reveals the complex balance between physics and necessity in naval operations.
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Sources
- Summary by Intellect · source: How Do Submarines Communicate Underwater?
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