FAA Military Competency Practice Exam

Where are portable electronic devices prohibited from being operated?

1. On all U.S. registered aircraft

2. In U.S. registered civil aircraft operated under IFR

3. On helicopters while flying

4. During taxiing of all aircraft

The correct answer is: In U.S. registered civil aircraft operated under IFR

The prohibition of portable electronic devices is primarily focused on ensuring safety and maintaining the integrity of navigational systems, especially when it comes to aircraft operating under Instrument Flight Rules (IFR). During IFR operations, pilot reliance on navigational aids is critical, and any interference from electronic devices could jeopardize the stability of communication and navigation systems. While there are restrictions concerning the use of electronic devices on all U.S. registered aircraft and during taxiing of all aircraft, the specific stipulation that addresses operational safety within IFR guidelines highlights a broader concern regarding air traffic control communication, navigation reliability, and overall flight safety during critical phases of flight. This understanding aligns with regulations to ensure that disturbances to cockpit operations are minimized. Therefore, operating portable electronic devices in U.S. registered civil aircraft under IFR conditions is particularly sensitive due to the implications it could have on the operational safety and effectiveness of the flight.