Question

What emergency distress signals will be used only to provide comms channels to airborne aircraft and ground stations. a. 7700 and 121.5 MHz

b. 121.5 MHz and 243.0 MHz
c. 121.5 MHz and 406 MHz
d. 406 MHz and 243.0 MHz

Answer 1

The emergency distress signals for aviation are 121.5 MHz for civilian and 243.0 MHz for military use, with the transponder code 7700 indicating an in-flight emergency. These frequencies must remain clear for emergencies, which is why mobile phone use can be restricted in areas where interference could be dangerous.

Step-by-step explanation:

The emergency distress signals for communication between airborne aircraft and ground stations are 121.5 MHz and 243.0 MHz. These frequencies are designated internationally for aviation emergency communications. Specifically, 121.5 MHz is the civilian emergency frequency, and 243.0 MHz is the military equivalent. Moreover, the transponder code 7700 is used by aircraft to signify an emergency situation. It is important for these frequencies to be reserved exclusively for emergencies to ensure that they are always available and not interfered with by other communications.

The use of mobile phones is often restricted on airplanes and in hospitals because these devices operate on frequencies that can interfere with essential communication and medical equipment. Thus, ensuring the integrity of emergency communications on aircraft and the proper function of medical devices in hospitals is a paramount safety concern.