Which emergency phase is triggered by a 406 MHz alert that is registered but unlocated?

• A. Alert
• B. Distress
• C. Urgent
• D. Safety

Answer: (B)

When a 406 MHz beacon is activated in a situation where it is registered but the exact location cannot be determined, the situation is classified as Distress. The beacon signaling itself confirms an emergency and requires immediate search-and-rescue action; the lack of a precise location means responders must work to locate the person or vessel, but the danger is ongoing and urgent. The registration helps rescuers identify who is in trouble and coordinate a response quickly.

This isn’t just an Alert, which would indicate a potential problem without an active, life-threatening emergency. It isn’t Urgent, which would apply to non-imminent safety messages, nor Safety, which is about routine safety information. The key point is that an active distress signal, even without a known location, triggers the Distress phase because immediate SAR action is warranted.