What is the primary purpose of an Emergency Locator Transmitter (ELT)?

What is the primary purpose of an Emergency Locator Transmitter (ELT)?

• A. To power the aircraft's lighting system
• B. To transmit distress signals to assist search and rescue
• C. To monitor cabin air quality
• D. To calibrate navigation instruments

Answer: (B)

The main idea behind an Emergency Locator Transmitter is to help rescuers locate a downed aircraft by broadcasting a distress beacon. When it activates, either after a crash or by manual activation, the ELT sends a signal that is picked up by satellites and search-and-rescue teams, sharing the aircraft’s identity and location so responders can find it quickly. Modern ELTs use 406 MHz with digital data, while older systems may also use 121.5/243 MHz. This is why it’s the best answer: the ELT’s purpose is to aid search and rescue through distress signaling. It isn’t meant to power the aircraft’s lights, monitor cabin air quality, or calibrate navigation instruments.

The main idea behind an Emergency Locator Transmitter is to help rescuers locate a downed aircraft by broadcasting a distress beacon. When it activates, either after a crash or by manual activation, the ELT sends a signal that is picked up by satellites and search-and-rescue teams, sharing the aircraft’s identity and location so responders can find it quickly. Modern ELTs use 406 MHz with digital data, while older systems may also use 121.5/243 MHz. This is why it’s the best answer: the ELT’s purpose is to aid search and rescue through distress signaling. It isn’t meant to power the aircraft’s lights, monitor cabin air quality, or calibrate navigation instruments.