In an emergency requiring urgent support, which 10-code is used?

• A. 10-21
• B. 10-30
• C. 10-29
• D. 10-25

Answer: (D)

When urgent support is needed, you switch to emergency traffic so all units know the situation and can respond immediately. This high-priority signal clears the normal flow of radio traffic and prompts rapid dispatch and back-up, ensuring units don’t miss the request or delay due to routine chatter. In many agencies, this is the designated emergency code you use to alert everyone to stand by and mobilize, so help can arrive as quickly as possible.

The other codes in the list are for routine actions: one is used to initiate a phone call or relay information by phone, another handles standard status or location checks, and another covers a non-urgent matter. They don’t convey the urgent, all-hands-back-up signal that emergency traffic communicates. Remember, exact codes can vary by agency, so it’s important to know your local 10-code set and the specific meaning of the emergency signal in your department.