What is the maximum distance between the departure airport and the designated takeoff altitude for CRJ900?

• A. 200 nautical miles
• B. 250 nautical miles
• C. 300 nautical miles
• D. 350 nautical miles

Answer: (B)

Designated takeoff altitude is the altitude used in takeoff performance calculations, and the CRJ900 performance data supporting those calculations is published as valid only up to a certain distance from the departure airport. For this aircraft, that validity limit is 250 nautical miles. This boundary ensures the climb gradient and engine-out performance assumed in the charts remain within tested, safe margins. If the plan would require reaching the designated altitude farther than 250 nm from the airport, you’d need to use an alternative procedure or different performance data, rather than relying on the same TOA calculations. So the maximum distance you can plan to reach the designated takeoff altitude from the departure airport is 250 nautical miles.