Whistles are a valuable security or emergency tool that can be kept on your key chain and used to communicate messages via Code, or call for HELP.
There are short sharp whistle codes for urgent or emergency messages and long whistles for non-urgent messages.
Short
- Danger, close, one minute away
- Danger, two minutes away
- Danger, three minutes away
Long
- All Clear
- O K
- I need HELP
Police Radio Codes
10 - X
| 0 | Use Caution |
| 1 | You are being received poorly / Cannot copy |
| 2 | You are being received clearly / Signal is strong |
| 3 | Stop Transmitting |
| 4 | Affirmative / Understood / Message Received |
| 5 | Relay Message to: |
| 6 | Busy / Out at call |
| 9 | Repeat last message |
| 10 | Negative / Flight in progress |
| 19 | Return to Station our Location: |
| 20 | Your location |
| 21 | Call by telephone |
| 22 | Disregard / Cancel last message |
| 33 | Emergency, All units stand by |
| 43 | Information |
| 76 | En route to location |
| 77 | Estimated time of arrival (ETA) |
| 84 | Advise ETA |
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