Airport Engineering
According to the International Civil Aviation Organization (I.C.A.O.), the runway lengths of aerodromes, have been coded by

Last Seven English alphabets
First Seven English alphabets
First seven natural numbers
Seven English alphabets

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Airport Engineering
In instrument landing system

Localizer and L.M.M. are installed on one side and L.O.M. on the other side
L.O.M. and Localizer are installed on one side and L.M.M. on the other side
None of these
L.O.M. and L.M.M. are installed on one side and Localizer antenna on the other side

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