UFC 3-260-01 Airfield and Heliport Planning and Design ...

3.13.1.4. Class B IFR Runway for Air Force Facilities. 3.13.1.5. Class B IFR Runway for Navy and Marine Corps Facilities. 3.13.2. Imaginary Surfaces. The area surrounding a runway that must be kept clear of objects that might damage an aircraft is bounded by imaginary surfaces that are defined in … ................
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