If one leg of your trip is within 4 NM and 2,500 feet AGL of a Class D airport, what is the maximum speed allowed?

The maximum speed allowed when flying within 4 nautical miles (NM) and 2,500 feet AGL of a Class D airport is set by airborne regulations to ensure safety and to maintain an orderly flow of air traffic. In this scenario, the speed limit is 200 knots. This restriction helps pilots while approaching and departing from busy airspace around Class D airports, where maintaining awareness of surrounding aircraft and coordination with air traffic control is crucial.

In general, airspace regulations are designed to promote safety and operational efficiency. Staying under this speed limit allows pilots to have more time to react to potential conflict with other aircraft, especially in busy terminal environments. The choice of a maximum of 200 knots is consistent with the Federal Aviation Administration's (FAA) directives regarding operations in and around controlled airspace.