This was initially invented as a means of military and marine communication especially over the Ocean.
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This was initially invented as a means of military and marine communication especially over the Ocean.
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Military communication, the transmission of information from reconnaissance and other units in contact with the enemy and the means for exercising command ...In the present-day armed forces, various types of military communications are used. Telephonic, telegraphic, phototelegraphic, and data transmission communications are carried on using wire and radio (radio relay and tropospheric) equipment.