Which statement about ELT transmission frequencies is correct?

• A. It transmits on 406 and 121.5 MHz
• B. It transmits on 30 and 300 MHz
• C. It transmits on 121.5 and 243.0 MHz
• D. It transmits on 58 and 108 MHz

Answer: (C)

ELTs use two types of transmissions: a 406 MHz beacon that goes to satellites, and local homing beacons on 121.5 MHz (civil) and 243.0 MHz (military UHF) that rescuers use to locate the beacon on the ground or from the air. The statement listing 121.5 and 243.0 MHz is correct because those are the two homing frequencies specifically used for locating an ELT once the initial satellite alert has been received. The other options mix in frequencies not used together for the ELT’s homing purpose or rely on the satellite frequency, which isn’t part of the homing pair.