Page 256 - Planning and Design of Airports
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HORIZONTAL SURFACE  150 FEET ABOVE ESTABLISHED AIRPORT
                                         E
                                        7:1  7:1



                         4,000
                                        7:1  7:1       ELEVATION  20-1 CONICAL SURFACE
                                  A
                            D
               A               7:1   7:1
                     C      E
                          B    7:1   7:1

                                        7:1  7:1

                                          50:1








                                         40:1     7:1
                                                                  FAR part 77 imaginary surfaces.
                                    7:1




                                          40:1           7:1

                             7:1




                                                                  FIGURE 6-25
                            5,000
                                           A  16,000       5,000



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