Which of the following is NOT a function of the ELT?

• A. Emitting a digital signal with the aircraft serial number
• B. Providing navigation assistance
• C. Emitting standard emergency tones on specific frequencies
• D. Activating upon significant G-forces

Answer: (B)

The correct response identifies a function that is not associated with the Emergency Locator Transmitter (ELT). The ELT's primary roles are to assist in search and rescue operations following an accident by emitting signals that are designed to help rescuers locate the aircraft.

One of its key functions is to emit a digital signal that includes the aircraft's unique serial number, which helps to identify the specific aircraft in distress. Additionally, the ELT emits standard emergency tones on designated emergency frequencies to alert nearby ground stations and aircraft to its distress signal. It is also designed to activate automatically when it experiences significant G-forces, indicating a possible crash scenario.

However, the ELT does not provide navigation assistance. Its purpose is strictly related to emergency signaling rather than aiding in in-flight navigation or guiding the aircraft to its destination. Therefore, recognizing that navigation assistance is outside the scope of the ELT's functionality clarifies why this choice is the correct answer.