In a nonradar environment, authorize simultaneous same-direction departures from parallel runways when centerlines are separated by _________ and courses diverge by __________ immediately after takeoff.

• A. 3,500ft or more; 45 degrees or more
• B. 2,000ft or more; 30 degrees or more
• C. 4,500ft or more; 60 degrees or more
• D. 1,000ft or more; 15 degrees or more

Answer: (A)

In a nonradar environment, safe simultaneous departures from parallel runways rely on geometry: you need enough initial lateral separation between the runways and a rapid divergence of the flight paths after takeoff so the two airplanes move apart quickly without radar guidance. When the centerlines are 3,500 feet or more apart and the courses diverge by 45 degrees or more immediately after takeoff, the paths separate quickly enough to maintain safe separation as the aircraft climb, reducing the risk of conflict or crossing paths. If either the runway separation is smaller or the divergence angle is less, the trajectories stay closer together longer, which can compromise safety without radar tracking.