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Autility airport is defined as one which has been designed, constructed, and maintained to accommodate approach category A and B aircraft . The specifications for utility airports are grouped for small aircraft, those of maximum certified takeoff weights of 12,500 lb or less, and large aircraft, those with maximum certified takeoff weight in excess of 12,500 lb.
Design specifications for utility airports are governed by the airplane design group and the types of approaches authorized for the airport runway, that is, visual, nonprecision instrument or precision instrument approaches.
Utility airports for small aircraft are called basic utility stage I, basic utility stage II, and general utility stage I. Utility airports for large aircraft
are called general utility stage II. Utility airports are further grouped for either visual and nonprecision instrument operations or precision instrument operations. The visual and nonprecision instrument operation utility airports are the basic utility stage I, basic utility stage II, or general utility stage I airports. The precision instrument operation utility airport is the general utility stage II airport.
A basic utility stage I airport has the capability of accommodating about 75 percent of the single engine and small twin engine aircraft used for personal and business purposes. This generally means aircraft weighing on the order of 3000 lb or less is given the airport reference code B-I, which indicates that it accommodates aircraft in aircraft approach categories A and B and aircraft in airplane design group I. A basic utility stage II airport has the capability of accommodating all of the airplanes of a basic utility stage I airport plus some small business and air taxi-type airplanes. This generally means aircraft weighing on the order of 8000 lb or less is also given the airport reference code B-I. A general utility stage I airport accommodates all small aircraft. It is assigned the airport reference code of B-II. A general utility stage II airport serves large airplanes in aircraft approach categories
A and B and usually has the capability for precision instrument operations. It is assigned the airport reference code of B-III.
A transport airport is defined as an airport which is designed, constructed, and maintained to accommodate aircraft in approach categories C, D, and E . The design specifications of transport airports are based upon the airplane design group.
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