Challenging puzzle for experienced crossword solvers
Lost Signals and Silent Codes
Perfect for beginners with simple, common vocabulary
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Across
- 1. Early typewriter-based sending system
- 2. Code using dots and dashes
- 3. Light touch or signal in code
- 5. Colorful signals used to send messages
- 6. Light signal to guide or warn
- 8. Sound signal often for calls or alerts
Down
- 4. Common greeting, also a start of a call
- 7. Brief burst of sound or light used to send info
- 9. Short for signal flag communication
- 10. Wireless device for sending sound signals
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