Airport Engineering
In approach areas of runways equipped with instrumental landing facilities any object within 4.5 km distance from runway end shall be considered as an obstruction if its height is more than

45 m
30 m
20 m
51 m

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Airport Engineering
Wing loading of an aircraft is

Gross total weight of the aircraft/ load of the wings
Gross total weight of the aircraft/total available H.P of engines
Gross total weight of the aircraft/ wing area
Load of the wings

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