What is the minimum altitude for class D controlled airspace?

The correct minimum altitude for Class D controlled airspace is typically 1,000 feet above ground level (AGL) in most jurisdictions, including under the standards set by the International Civil Aviation Organization (ICAO). Class D airspace is designated around airports with an operational control tower, and the primary purpose is to provide separation between aircraft while allowing for the safe operation of flights in close proximity to the airport.

In the context of Class D airspace, the minimum altitude is set at a level that allows aircraft to safely operate within the controlled airspace while also providing a buffer above the ground level. This altitude is critical for ensuring that aircraft can enter and exit the airspace safely, particularly in busy traffic areas around airports.

The choice indicating 2,000 feet is higher than the standard, which is not typical for Class D airspace. Understanding the regulations governing altitude restrictions helps pilots navigate controlled environments and ensures compliance with air traffic control directives.