What is the speed limit below 10,000 feet?

The correct answer is 250 KTS. This speed limit is set by regulations to enhance safety and efficiency in the airspace below 10,000 feet, particularly in the vicinity of busy airports where many aircraft are operating. Maintaining a speed limit of 250 knots helps to reduce the risk of wake turbulence encounters and allows for better management of aircraft separation by air traffic control.

The limit is specifically designed to accommodate the complexities of lower altitude flight operations, which often involve multiple aircraft in close proximity during takeoff and landing procedures. The choice of 250 knots strikes a balance between maintaining operational efficiency and ensuring safety without unnecessarily hindering the speed of aircraft transitioning to or from higher altitudes.

Other speed limits, such as 200 KTS or lower limits, are typically relevant to specific airspace conditions or requirements but do not apply universally. Hence, the standard speed limit at altitudes below 10,000 feet is set at 250 knots, as it is deemed to provide the best compromise for safety and operational efficiency.