Which frequency is designated as the Aeronautical Emergency Frequency?

The frequency designated as the Aeronautical Emergency Frequency is 121.5 MHz. This frequency is specifically allocated for distress and emergency purposes, allowing aircraft in distress to communicate with air traffic control and other aircraft. It is monitored continuously by air traffic services and other aviation entities around the world, making it a critical channel for receiving urgent assistance.

Moreover, this frequency is part of international air navigation agreements established by organizations such as the International Civil Aviation Organization (ICAO) and serves as a reliable means for pilots to declare emergencies and coordinate search and rescue operations. It ensures that any aircraft needing urgent support has a universal frequency it can rely on, reinforcing safety in aviation communications.

The other frequencies mentioned serve different purposes. For instance, 122.8 MHz is commonly used for general aviation communications, 123.45 MHz is often utilized as a common traffic advisory frequency, and 125.0 MHz might be specific to certain air traffic control functions or local aerodrome operations, but none are designated as the primary emergency frequency.