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Airport control towers (Pmfgf)

Facilities (P)
     Use For: Complexes; Installations
    Transportation, hydraulic and utility facilities (Pm)
        Air transportation facilities (Pmf)
             Use For: Aeronautical facilities; Aviation facilities; Civil aviation facilities
            Air traffic control facilities (Pmfg)
                 Use For: Ground stations
                Air route traffic control centers (Pmfgc)
                Airport control towers (Pmfgf)
                Flight service stations (Pmfgs)