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a. 40:1 for (Designate all <br /> <br />existing or planned non-precision instrument runways and visual <br /> <br />runways other than utility.) <br /> <br />b. 20:1 for (Designate all <br /> <br />other existing or planned visual utility runways.) <br /> <br />The approach surface expands uniformly to a width of: <br />C. 4,000 feet for-'~ a distance of~~ <br />~0,O00 feet, then continues at the same rate of divergence for an <br />~_ additional 4,,000 feet to ,,the, periphery of t~ conical surface. ~,~' <br /> (Designate all existing or planned nor~-precision instrument runways <br /> <br />having visibility minimums as iow as three-fourths of a statute <br /> <br />I~ ~ d. 3,500 feet for <br /> <br /> existing or planned non-precision instrument runways having <br /> visibility minimums greater than three-fourth~ of a statute mile.) <br /> <br /> e. 2,500 feet for ~ <br /> I ~lO",oo~-feet~t'o the periphery of the conical surface. (Designate <br /> I ~.~11 existing or planned v~sual run~_~_a~s other than utility.) <br /> <br />, f. 2,250 feet for ~a distance °f <br />II .~0','000 feet to the periphery of the conical surface. (Designate J <br /> I ~all_ other existing, or planned visual utility runways.) ~ <br /> 5. PRECISION INSTRUMENT APPROACH ZONE: Ail that land whi'ch lies directly <br /> <br />under an imaginary precision instrument approach surface longitudinally <br /> <br />centered on the extended centerline at each end of , <br /> <br />a precision instrument runway. The inner edge of the precision instrument <br /> <br />I <br />I <br /> <br />approach surface is at the same width and elevation as, and coincides with, <br />the end of the primary surface. The precision instrument approach surface <br />inclines upward and ~utward at a slope of 50 to 1 for a horizontal distance <br /> <br /> --8-- <br /> <br /> <br />