What is a primary effect of activating the orange emergency alarm button?

• A. Sets off an alarm
• B. Sends a text to all units
• C. Locks radio channels
• D. Sets off an alarm and displays the units portable ID

Answer: (D)

The main function of the orange emergency alarm button is to rapidly alert everyone while also revealing who initiated the alert. It doesn’t just trigger an alarm or just display an ID in isolation—the two work together: the alarm cues responders to an urgent situation, and the portable ID display tells incident command and nearby units which unit started it. This combination improves both speed of response and accountability, which is why it’s the best description of its primary effect. Other options either describe only part of the function or involve actions that aren’t how this button is intended to operate (for example, paging everyone by text or locking radio channels), so they don’t capture the button’s primary purpose.