Establishment of Class D and Class E Airspace; Grayling, MI

This action establishes Class D airspace and Class E airspace at Grayling Army Airfield, Grayling, MI. Establishment of an air traffic control tower at Grayling Army Airfield has made this action necessary for the safety of Instrument Flight Rule (IFR) operations at the airport. Class D airspace will revert to a Class E Surface Area during periods when the control tower is not operating. This action also corrects the required arrival extension to the Class D airspace and redesignates it as Class E4 airspace.