Garmin G1000 Pilot’s Guide for Cessna Nav III
190-00498-07 Rev. A
62
FLIGHT INSTRUMENTS
SYSTEM
OVERVIEW
FLIGHT
INSTRUMENTS
EIS
AUDIO PANEL
& CNS
FLIGHT
MANAGEMENT
HAZARD
AVOIDANCE
AFCS
ADDITIONAL
FEATURES
APPENDICESINDEX
COURSE DEVIATION INDICATOR (CDI)
NOTE: During a heading change of greater than 105˚ with respect to the course, the CDI on the Arc HSI
switches to the opposite side of the deviation scale and displays reverse sensing.
The Course Deviation Indicator (CDI) moves left or right from the course pointer along a lateral deviation
scale to display aircraft position relative to the course. If the course deviation data is not valid, the CDI is not
displayed.
Figure 2-19 Course Deviation Indicator
Crosstrack
Error CDI
Navigation
Source
CDI
Scale
Flight
Phase
Arc HSI
Navigation
Source
Scale
CDI
360º HSI
Flight
Phase
TheCDIcandisplaytwosourcesofnavigation,GPSorVOR/LOC.Thecolorindicatesthecurrentnavigation
source,magentaforGPSandgreenforVORandLOC.Thefullscalelimits fortheCDIaredenedbyaGPS-
deriveddistancewhen navigatingGPS. Whennavigatingusing aVORor localizer(LOC),the CDIusesthe
same angular deviation as a mechanical CDI. If the CDI exceeds the maximum deviation on the scale (two dots)
whilenavigatingwithGPS,thecrosstrackerror(XTK)isdisplayedbelowthewhiteaircraftsymbol.
Figure 2-20 Navigation Sources