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Do police officers use codes on their walkie talkies? If not, why don't they just say 'I need backup at this location'? Or does this happen sometimes without being coded as such? -
Appendix D Ten-Code Signals for Police and Emergency Personnel - Ham and Shortwave Radio for the Electronics Hobbyist [Book]
10 Codes - 10 CODES 10-0 Caution 10-1 Unable to copy, change location 10-2 Signal Good, Loud and - Studocu
Check the Police Codes if you don't know them 10-4! | Police code, Police radio codes, Police radio