Military Communications
The United States Navy utilized extremely low frequencies (ELFs) as radio band and radio communications. The Submarine Integrated Antena System (SIAS) was a research and development effort to communicate with submerged submarines. The Soviet/Russian Navy also utilized ELFs for submarine communications system, ZEVS.
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“[I]t is a civil Cowardice to be backward in asserting what you ought to expect, as it is a military Fear to be slow in attacking when it is your Duty.”
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