Airspace Classification & Sectional Charts
Class B, C, D, and surface-area Class E airspace
Explanation: Controlled airspace requires authorization before flight operations can lawfully occur.
Class D airspace
Explanation: Dashed blue/magenta lines designate surface areas for Class D control zones.
5 statute miles
Explanation: Class D airspace typically extends outward with a 5-statute-mile radius from the center airport.
3 statute miles visibility from the control station
Explanation: Visibility must be no less than 3 statute miles from the control station throughout operations.
Notice to Air Missions (NOTAM)
Explanation: TFRs are disseminated via NOTAMs to alert pilots of restricted airspace constraints.