If you think your life is in immediate danger, transmit the MAYDAY signal and then:

• A. Activate your PASS device first
• B. Communicate your situation to the IC before activating your PASS device
• C. Call your supervisor on the radio
• D. Stand by and conserve air

Answer: (D)

The priority after sending a MAYDAY is to preserve your breathing air. In an immediate danger, your SCBA air supply is finite, and any unnecessary exertion or actions can rapidly consume that air. By standing by and conserving air, you minimize breathing rate and physical activity, which buys time for rescuers to locate you and reach you.

Activating your PASS device or trying to communicate further are useful supports, but they don’t replace the need to guard your air. The most critical move right after signaling is to reduce movement, stay calm, and conserve air so you can endure until help arrives.