What is the emergency frequency for aviation communication?

The emergency frequency for aviation communication is 121.5 MHz. This frequency is designated for use in distress and emergency situations, allowing pilots and air traffic control to communicate effectively during emergencies. It's essential for both commercial and general aviation pilots to monitor this frequency when in flight, as it provides a means to request assistance and coordinate rescue efforts if needed.

121.5 MHz is also the frequency used by aircraft to communicate with search and rescue services, and it is monitored continuously by air traffic control facilities. Additionally, this frequency is often included in pre-flight briefings and safety protocols, underscoring its importance in aviation safety.

The other frequencies listed serve different purposes: 121.2 MHz is typically used for air traffic control communications in certain airspaces; 122.8 MHz is commonly used for flight service stations and common traffic advisory frequencies; and 123.45 MHz is typically used for general aviation and non-towered airport communications. Thus, selecting 121.5 MHz as the emergency frequency is critical for ensuring pilots can efficiently manage distress situations.