CrosswordMint
Vintage Signals and Forgotten Codes
A crossword exploring historical and obsolete communication codes once used to transmit secret messages and early transmissions.
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Across
  • 1. Visual signaling with flags or lights for communication
  • 2. Code using two symbols, often used in basic digital signals
  • 3. Type of pigeon known for returning home with messages
  • 4. Early system transmitting messages via electric pulses
  • 7. Code using spoken alphabet to clarify letters
  • 8. Chiming code system used for silent signaling
  • 11. Early telegraph cross-checking code or signal
  • 13. Bird historically used to carry messages
Down
  • 5. Code using dots and dashes for telegraphy
  • 6. Device flashing sunlight to send coded signals
  • 9. Person delivering messages before electronic communication
  • 10. Primitive rotating signal device for coded messages
  • 12. Ship signaling using the arrangement of flags
  • 14. Sound-based signaling device used in early communication

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