When activated, what frequencies does an emergency locator transmitter (ELT) transmit on?

The emergency locator transmitter (ELT) is a crucial safety device designed to assist in locating downed aircraft. When activated, an ELT transmits distress signals on frequencies of 121.5 MHz and 243.0 MHz. The 121.5 MHz frequency is specifically designated for emergency locator transmissions and is monitored by various government and civilian organizations, including search and rescue operations. The 243.0 MHz frequency is primarily used for military distress signals and is an important frequency that can be monitored by military forces and aircraft.

This dual-frequency system allows for redundancy and increases the chances of recovery, as both civilian and military search and rescue teams can intercept the signals. Understanding these frequencies is vital for pilots, crew members, and anyone involved in search and rescue efforts, ensuring that help can be effectively directed to those in distress.