T-45C TS, ADV & IUT ENG-21
CNI System
c.
Marker beacon: provides beacon passage by
Sg 3, fr 8
flashing marker beacon lights and audio tone
Fig 12: VOR/ILS
System--Marker
Beacon Lights
Marker
Beacon
Lights
Figure 12: VOR/ILS SYSTEM--MARKER BEACON LIGHTS
(1) I (White) illuminated indicates aircraft
passing over inner marker beacon
(2) M (Amber) illuminated indicates aircraft
passing over middle marker beacon
(3) O (Blue) illuminated indicates aircraft
passing over the outer marker beacon
(4) MKR switch selected up on the
communications control panel permits
delivery of marker beacon audio signal to
pilot's headset
Page 21-29
(9-98) Original
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