Archaeology enthusiasts scanning the Baltic Sea for lost treasures have stumbled upon six enigma machines which were used by Nazi Germany during World War II and were likely thrown overboard in a panic. Enigma machines were devices used by the German navy during the second world war to send encoded messages which, the hope was, could not be read by the Allies. The machines had three interchangeable rotors that scrambled messages which were then sent via Morse code to a receiver machine with the same settings.

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