What is the emergency frequency for aircraft communication?

The emergency frequency for aircraft communication is 121.5 MHz. This frequency is specifically designated for emergency situations and is monitored by air traffic control and other aircraft. It serves as a universal distress frequency for pilots to call for help in an emergency, providing critical means of communication when other channels may not be available.

The reason 121.5 is used is because it can be used by pilots in distress anywhere in the world. Additionally, it is also the frequency that emergency locator transmitters (ELTs) operate on, allowing for search and rescue operations to locate aircraft in the event of an accident. Maintaining the correct frequency in emergencies is vital for coordinating assistance and ensuring the safety of all involved.