
190-00498-00 Rev. A
Garmin G1000 Pilot’s Guide for Cessna Nav III
5-7
AUDIO PANEL
Beacon Audio Frequency Audio Keying Rate Lamp Color
Outer Marker
400 Hz — — — 2 dashes per second Blue
Middle Marker
1300 Hz • — • —
95 dot-dash combinations
per minute
Amber
Airway/Inner Marker
3000 Hz • • • • 6 dots per second White
Table 5-1 Marker Beacon Signal Characteristics
Inner Marker Middle Marker Outer Marker
Figure 5-4 Marker Beacon Signal Indicator Lights on the PFD
NAVIGATION RADIOS
Pressing NAV1, NAV2 or optional DME or ADF
selects and deselects the radio source and the annunciator
(Figure 5-5). Selected audio can be heard over the
headset and the speakers. All radio keys can be selected
independently.
When no further navigation radio audio is heard, the
amount of background noise is reduced by the
Master
Avionics Squelch (MASQ) feature.
Figure 5-5 Navigation Radio Keys
Disabled on
Cessna NAV III
aircraft
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