While in flight and operations permitting, all Coast Guard aircraft shall guard these emergency frequencies. Which of the following is included in the required list?

• A. International Air Distress (IAD) 121.5, Military Air Distress (MAD) 243.0, VHF-FM Channel 16 (156.800), VHF-FM DSC Ch 70, 406 MHz EPIRB
• B. IAD 121.5, Channel 16 156.800 only
• C. MAD 243.0 and Channel 16 only
• D. EPIRB 406 MHz only

Answer: (A)

Guarding emergency frequencies in flight ensures rapid communication and location during distress. International Air Distress 121.5 MHz provides a global airborne distress channel monitored by rescue services and other aircraft. Military Air Distress 243.0 MHz supports military aviation distress and is commonly monitored in joint operations, adding a critical safety layer in mixed missions. VHF-FM Channel 16 at 156.800 MHz is the primary distress and calling channel for maritime and many aviation operations, enabling immediate contact with rescuers and other users. VHF-FM DSC Channel 70 brings digital distress signaling and direct calling capabilities, enhancing reliability when voice channels are overloaded or unseen. The 406 MHz EPIRB is a satellite-reported beacon that broadcasts location and identity to rescue authorities, greatly speeding SAR response, especially in remote areas. Together, these frequencies cover voice distress, digital calling, and satellite beacon alerts, providing comprehensive coverage for emergency readiness. The other options miss one or more of these essential modes, reducing the effectiveness of emergency communications.