Cessna 172R Operating Handbook page 470

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SECTION SUPPLEMENTS
9
SUPPLEMENT
19
1. HSI ANNUNCIATOR LIGHT
optional HSI is installed. The HSI course pointer provides
course datum
2. NAVIGATION SOURCE (NAV) ANNUNCIATOR
annunciator will illuminate steady to inform the pilot that NAV
1 information is being displayed on the NAV 1 CDI.
NAVIGATION SOURCE (GPS) ANNUNCIATOR
3.
annunciator will illuminate steady to inform the pilot that GPS
information is being displayed on the NAV 1 CDI.
NAV/GPS SWITCH
4.
versa to control the type of navigation data to be displayed on
the CDI (Course Deviation Indicator). The
Bearing Selector (OBS) provides analog
KLN 94 in OBS mode when the NAV/GPS switch/annunciator
is in GPS.
GPS course selection in OBS mode is digital through
NAV,
the use of the controls
GPS Annunciator/Switch (Serials 17280984 and On)
Figure 2.
S19-10
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FAA APPROVED
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to the autopilot.
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Toggles from Nav 1 to GPS and vice
When the NAV/GPS switch
and display at
(Sheet 1 of 2)
This label is present when the
No.
course
annunciation
the KLN
94.
CESSNA
MODEL 172R
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The NAV
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The GPS
1 CDI Omni
input to the
is in
Dec 30/00