Air Traffic Skills Assessment (ATSA) PracticeTest

What is the minimum separation time required between two IFR aircraft under standard longitudinal separation?

1. 10 minutes

2. 15 minutes

3. 20 minutes

4. 25 minutes

The correct answer is: 20 minutes

The minimum separation time required between two IFR (Instrument Flight Rules) aircraft under standard longitudinal separation is indeed 20 minutes. This standard is established to ensure safe operation within controlled airspace, preventing potential collisions that could arise from improper spacing. Under standard procedures, aircraft flying on the same route at the same or similar altitudes must maintain this 20-minute interval between each other to account for factors such as variations in speed, operational limitations, and possible changes in flight paths. This time buffer allows air traffic controllers to manage traffic flow effectively, ensuring that each aircraft has ample time to react to any changes or emergencies that may arise during flight. Understanding standard longitudinal separation helps pilots and air traffic controllers maintain the safety and efficiency of the airspace, as it provides a clear and consistent framework for aircraft separation in the busy environments in which they operate.