http://en.wikipedia.org/wiki/Communicat ... submarines UHF radio to Russian UHF receivers communications with submarines http://en.wikipedia.org/wiki/Communicat ... submarines http://en.wikipedia.org/wiki/Communication_with_submarines targeting information and orders Wikipedia: http://en.wikipedia.org/wiki/Communication_with_submarines http://en.wikipedia.org/wiki/Communicat ... submarines http://en.wikipedia.org/wiki/Communication_with_submarines https://en.wikipedia.org/wiki/Communication_with_submarines Communication with submarines http://en.wikipedia.org/wiki/Communication_with_submarines Communication with submarines comunicaciones con un submarino http://en.wikipedia.org/wiki/Communication_with_submarines English communicate with submerged submarines http://en.wikipedia.org/wiki/Communication_with_submarines http://en.wikipedia.org/wiki/Communication_with_submarines problem for submarines this as an example. Wikipedia: http://en.wikipedia.org/wiki/Communication_with_submarines communicate with deep-ocean submarines extremely low frequencies http://en.wikipedia.org/wiki/Communicat ... submarines targeting information and orders http://en.wikipedia.org/wiki/Communication_with_submarines http://en.wikipedia.org/wiki/Communication_with_submarines http://en.wikipedia.org/wiki/Communication_with_submarines http://en.wikipedia.org/wiki/Communication_with_submarines http://en.wikipedia.org/wiki/Communication_with_submarines http://en.wikipedia.org/wiki/Communicat ... submarines extremadamente baja frecuencia wavelengths thousands of km long wavelengths thousands of km long comunicaciones con un submarino this as an example. Communication with submarines http://en.wikipedia.org/wiki/Communicat ... submarines http://en.wikipedia.org/wiki/Communicat ... submarines http://en.wikipedia.org/wiki/Communication_with_submarines http://en.wikipedia.org/wiki/Communication_with_submarines communicating with submerged submarines possible VLF signals were around before the moon landing 'Extremely low frequency' http://en.wikipedia.org/wiki/Communication_with_submarines http://en.wikipedia.org/wiki/Communication_with_submarines http://en.wikipedia.org/wiki/Communicat ... submarines extremely low frequences http://en.wikipedia.org/wiki/Communicat ... submarines http://en.wikipedia.org/wiki/Communicat ... submarines Wikipedia: Wikipedia: communication with submarines targeting information and orders