A crossword exploring historical and obsolete communication codes once vital for messaging around the globe.
Vanished Signals: Historic Communication Codes
Explore a crossword featuring forgotten and archaic communication codes that once connected the world.
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Across
- 1. Visual signaling system using flags or arms
- 2. Bird used historically to carry messages
- 3. Early system transmitting messages via coded electrical signals
- 5. Obsolete German telegraph code for letter substitution
- 6. Unbreakable Native American code used in WWII
- 8. Dot-and-dash code named after its inventor
Down
- 4. Sunlight signaling device using mirrors
- 7. Code used for telegram encryption in the 19th century
- 9. Early telegraph code replacing Morse with five-bit signals
- 10. Navy signaling method using a series of flags
- 11. Method of transforming text for secrecy
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