What does the code "10-3" signify?

The code "10-3" signifies "Stop Transmitting." This code is used in communication among law enforcement officers to indicate that they should cease all radio transmissions. This may be necessary when there is a need for clear communication, avoiding interference on the channel, or when critical information must be relayed without background noise.

In high-pressure situations, officers may need to establish a quiet frequency to ensure that vital communications are heard and understood without disruption. Thus, understanding and using this code helps maintain operational efficiency and clarity in law enforcement communications.