OSH Security Practice Test 2026 – 400 Free Practice Questions to Pass the Exam

The correct code for "stop transmitting" is indeed 10-3. This code is widely used across various communication systems, particularly in law enforcement and emergency services, to instruct individuals to cease all communication temporarily. This can be crucial in situations where important messages need to be communicated without interference or when the airwaves need to be clear for emergency transmissions.

The other codes, while part of the 10-codes system, serve different purposes. For instance, 10-6 refers to a need for the officer to "busy" or indicate that they cannot respond to communications at that moment, whereas 10-7 signifies that an officer is "out of service," meaning they are unavailable for calls. Lastly, 10-8 indicates that an officer is "in service," which means they are available to take calls again. Each of these codes is designed to convey specific status updates, demonstrating the structured communication methodology employed in such settings.