What do codes that police officers use mean? For example, they use 10-4, 1033, 487, and stuff like that. - Quora
![Appendix D Ten-Code Signals for Police and Emergency Personnel - Ham and Shortwave Radio for the Electronics Hobbyist [Book] Appendix D Ten-Code Signals for Police and Emergency Personnel - Ham and Shortwave Radio for the Electronics Hobbyist [Book]](https://www.oreilly.com/api/v2/epubs/9780071832922/files/t0283-01.jpg)
Appendix D Ten-Code Signals for Police and Emergency Personnel - Ham and Shortwave Radio for the Electronics Hobbyist [Book]
![Appendix D Ten-Code Signals for Police and Emergency Personnel - Ham and Shortwave Radio for the Electronics Hobbyist [Book] Appendix D Ten-Code Signals for Police and Emergency Personnel - Ham and Shortwave Radio for the Electronics Hobbyist [Book]](https://www.oreilly.com/api/v2/epubs/9780071832922/files/t0281-01.jpg)
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 10 Codes - 10 CODES 10-0 Caution 10-1 Unable to copy, change location 10-2 Signal Good, Loud and - Studocu](https://d20ohkaloyme4g.cloudfront.net/img/document_thumbnails/1b0b50869f07edeff4f3b1777794ccf4/thumb_300_459.png)