What is the speed limit in Class D airspace below 2500 AGL within 4 nautical miles?

The speed limit in Class D airspace below 2500 feet Above Ground Level (AGL) within 4 nautical miles of the airport is established to ensure safety and manage traffic effectively in areas where there may be a mix of aircraft, including slower general aviation and possibly more complex operations associated with commercial aviation.

Setting the speed limit at 200 knots in these environments helps maintain a balance between operational efficiency for faster aircraft and safety considerations for slower aircraft, such as those arriving or departing the airport. This regulation is particularly important near airports where airspace is congested, and variable speed limits aid in preventing potential collisions and facilitating smoother traffic flow.

In contrast, higher speed limits might pose risks to slower aircraft, increasing potential for wake turbulence or procedural conflicts during takeoff and landing phases. Thus, 200 knots serves as an effective standard for managing air traffic around Class D airspace within the specified altitude and distance.