What does the ELT emit when experiencing a velocity change of 3.5 fps or a sustained force of 30 G or more?

What does the ELT emit when experiencing a velocity change of 3.5 fps or a sustained force of 30 G or more?

• A. Standard emergency tone is emitted on 121.5 and 243.0 MHz
• B. Standard emergency tone is emitted every 520 milliseconds
• C. Digital signal containing the aircraft serial number is emitted
• D. Digital signal containing the GPS location is emitted

Answer: (A)

The best choice accurately reflects the function of the Emergency Locator Transmitter (ELT) when it detects a significant event, such as a velocity change of 3.5 feet per second or a sustained force of 30 G or more. In these circumstances, the ELT is designed to emit a distress signal that conforms to aviation emergency broadcasting standards, specifically on the frequencies of 121.5 and 243.0 MHz. These frequencies are widely recognized as emergency frequencies, allowing search and rescue operations to quickly localize and respond to potential aircraft emergencies. This aspect of ELT functionality is crucial for enhancing the chances of locating an aircraft in distress, as the standard emergency tone alerts nearby aircraft and ground stations to the situation, ensuring a rapid response to the emergency. The focus on these frequencies underscores their importance in aviation safety protocols. While the other options mention important features that certain ELT models may have, they do not directly address the immediate response actions taken during the detection of a significant change in velocity or force, which is specifically the emission of a standard emergency tone on the recognized distress frequencies.

The best choice accurately reflects the function of the Emergency Locator Transmitter (ELT) when it detects a significant event, such as a velocity change of 3.5 feet per second or a sustained force of 30 G or more. In these circumstances, the ELT is designed to emit a distress signal that conforms to aviation emergency broadcasting standards, specifically on the frequencies of 121.5 and 243.0 MHz. These frequencies are widely recognized as emergency frequencies, allowing search and rescue operations to quickly localize and respond to potential aircraft emergencies.

This aspect of ELT functionality is crucial for enhancing the chances of locating an aircraft in distress, as the standard emergency tone alerts nearby aircraft and ground stations to the situation, ensuring a rapid response to the emergency. The focus on these frequencies underscores their importance in aviation safety protocols.

While the other options mention important features that certain ELT models may have, they do not directly address the immediate response actions taken during the detection of a significant change in velocity or force, which is specifically the emission of a standard emergency tone on the recognized distress frequencies.