▁ 9 0 8 ▁feet ▁( 2 7 7 ▁m ) ▁above ▁mean ▁sea ▁level . ▁Its ▁one ▁run way , ▁ 6 / 2 4 , ▁is ▁gra vel , ▁ 3 , 6 0 0 ▁by ▁ 7 5 ▁feet ▁( 1 , 0 9 7 ▁x ▁ 2 3 ▁m ). ▁In ▁ 2 0 0 5 ▁the ▁air port ▁had ▁ 2 , 4 0 0 ▁aircraft ▁operations , ▁ 8 3 % ▁general ▁av iation ▁and ▁ 1 7 % ▁air ▁tax i . ▁ ▁Airlines ▁and ▁destin ations ▁ ▁Statistics ▁ ▁References ▁ ▁External ▁links ▁▁ ▁F AA ▁Al aska ▁air port ▁diagram ▁( G IF ) ▁ ▁Category : A ir ports ▁in ▁the ▁S out heast ▁Fair b anks ▁Census ▁Area , ▁Al aska <0x0A> </s> ▁In ▁comput ability ▁theory , ▁a ▁sem ic om put able ▁function ▁is ▁a ▁partial ▁function ▁ ▁that ▁can ▁be ▁approxim ated ▁either ▁from ▁above ▁or ▁from ▁below ▁by ▁a ▁comput able ▁function . ▁ ▁More ▁precisely ▁a ▁partial ▁function ▁ ▁is ▁upper ▁sem ic om put able , ▁meaning ▁it ▁can ▁be ▁approxim ated ▁from ▁above , ▁if ▁there ▁exists ▁a ▁comput able ▁function ▁, ▁where ▁ ▁is ▁the ▁desired ▁parameter ▁for ▁ ▁and ▁ ▁is ▁the ▁level ▁of ▁approximation , ▁such ▁that : ▁▁▁▁▁▁ ▁Comple t ely ▁analog ous ▁a ▁partial ▁function ▁ ▁is ▁lower ▁sem ic om put able ▁if f ▁ ▁is ▁upper ▁sem ic om put able ▁or ▁equival ently ▁if ▁there ▁exists ▁a