Garmin G3X Pilot's Manual page 97

Enabling/disabling the bearing pointer and changing sources:
1) From the full screen PFD and/or split screen PFD Page, press the MENU Key.
2) Move the FMS Joystick to highlight the desired Bearing Pointer.
3) Turn the FMS Joystick to highlight the desired source (dependant on the
external navigators configured), or to remove the bearing pointer and
information window, highlight 'Off'.
COURSE DEVIATION INDICATOR (CDI)
The HSI contains a Course Deviation Indicator (CDI), with a Course Pointer, To/From
Indicator, and a sliding deviation bar and scale. The course pointer is a single line
arrow (GPS1, VOR1, and LOC1) or a double line arrow (GPS2, VOR2, and LOC2) which
points in the direction of the set course. The To/From arrow rotates with the course
pointer and is displayed when the active NAVAID is received.
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.
Another Lateral Deviation Scale and combination Course Deviation and To-From
Indicator is located below the slip/skid indicator.
Course Deviation &
To/From Indicator
The CDI is capable of displaying two sources of navigation: GPS or NAV (VOR,
localizer) depending on the external navigator(s) configured (refer to the G3X
Installation Manual for more information). Color indicates the current navigation
source: magenta (for GPS) or green (for VOR and LOC). The full-scale limits for the CDI
are defined by a GPS-derived distance when coupled to GPS. When coupled to a VOR
or localizer (LOC), the CDI has the same angular limits as a mechanical CDI. If the
CDI exceeds the maximum deviation on the scale (two dots) while coupled to GPS, the
crosstrack error (XTK) is displayed below the white aircraft symbol.
190-01115-00 Rev. J
Lateral Deviation Scale
Garmin G3X Pilot's Guide
Flight Instruments
Lateral
Deviation
Scale
77