Talk:Underwater telephone

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Physics: Acoustics

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NATO Submarine Rescue System also use an "underwater communications equipment, the TELSON emergency underwater telephone from Sonistics."^[1] — Preceding unsigned comment added by Pyrog (talk • contribs) 15:52, 22 November 2017 (UTC)[reply]

^ http://www.thinkdefence.co.uk/submarine-escape-rescue/submarine-rescue/

[1] ttp://www.thinkdefence.co.uk/submarine-escape-rescue/submarine-rescue/

[1]