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 would sincerely regret, and which never shall happen whilst I am in office, a military guard around the President.”
—Andrew Jackson (1767–1845)
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