Official Ten-Code List Association of Public Communications Officers (APCO) 10-0 Caution 10-1 Unable to copy -- change location 10-2 Signal good 10-3 Stop transmitting 10-4 Acknowledgement (OK) 10-5 Relay 10-6 Busy -- stand by unless urgent 10-7 Out of service 10-8 In service. The usage of police codes such as 10-53 which means Road Blocked / Man Down is designed to make the communication between the the police crew easier, faster and clearer. Instead of making mistakes in the comunnication, missplelling or stating long descriptions, stating a police code such as 10-53 is best efficient and creating a clear speech.
10-53 Police Code. Home; Ten Codes; 10-53; 10-53 Code in Different Locations / Departments. Region Location Definition. Generic Ten Codes Road Blocked at.. What does police code 10-53 mean? Police code 10-53 means Road blocked / Man down. Related Codes. Police Code 10-50; Police Code 10-51; Police Code 10-52; Police Code 10-54; Police Code 10-54d; Police Code 10-55; Code Categories. Police Radio 10-Codes; Police Radio 11-Codes; Basic Police Radio Codes;