Aircraft communications and navigation systems
1 54
Runway
(b) Glide slope antenna
(a) Glide slope beams Figure 1 2.3 G l ide slope beams and antenna
Middle
Inner
Runway
1050 m
'• I I I
Outer
I IJ:I I
3.9 nm
(a) I LS marker beacons Yellow
Cyan
White
F 0
0 0 s
!AS G/S LOC
Outer marker
Middle marker
Inner marker
(b) Marker beacon ind ications (primary flying display) Figure 1 2.4 I LS marker beacon system
