FAA Ground School Practice Test

What is the significance of the 121.5 MHz frequency?

1. It is used exclusively for commercial flights

2. It is an emergency frequency for general aviation

3. It is reserved for military communication

4. It is used for weather updates only

The correct answer is: It is an emergency frequency for general aviation

The 121.5 MHz frequency holds significant importance as an emergency frequency specifically designated for general aviation and other aircraft in distress. When pilots encounter an emergency situation, they can utilize this frequency to communicate their need for assistance, allowing air traffic controllers and other aircraft to gain awareness of their predicament. The use of this frequency is critical because it is monitored by various entities, including air traffic control and search and rescue agencies, ensuring a swift response to emergencies. It serves as a universal distress frequency, recognized internationally, thus enhancing the safety of all aircraft in the aviation system. While some of the other choices mention roles for specific groups or functions, they do not reflect the established use of 121.5 MHz in emergency situations, which underscores its significance in protecting lives and facilitating timely assistance in aviation emergencies.