Class D Airspace Description: - Surrounds smaller towered airports - Typically 4 nm radius - Generally, from the surface to 2,500 agl - Usually reverts to a Class E surface area when the tower is closed - May include Class E surface area extensions Requirements/Limitations: - Establish and maintain two-way communication - Visibility: Three statute miles - Cloud clearance: - 500 feet below - 1,000 feet above - 2,000 feet horizontal - Operations are restricted for recreational, sport pilot, and students seeking either certificate Question: Is there a speed limit within Class D airspace? Answer: Yes. Below 2,500 agl and within four nautical miles of the primary airport, aircraft are limited to 200 knots indicated airspeed. Ref. FAR 91.129 and AIM 3-2-5 © Air Safety Institute airsafetyinstitute.orghttp://www.airsafetyinstitute.org http://www.airsafetyinstitute.org