Garmin G3X Touch - Turn Rate Indicator

Garmin G3X Touch
™
Pilot’s Guide for Certified Aircraft
190-02472-00 Rev. D
74
Flight Instruments
System
Overview
Flight
InstrumentsEIS
CNS
Interface
GPS
Navigation
Flight
Planning
Hazard
Avoidance
Additional
FeaturesAFCSAnnun/AlertsAppendixIndex
CDI SCALE SELECTION (INTERNAL GPS ONLY)
NOTE: When an external GPS navigator is in use, the CDI scale is determined
by the navigator.
Three factors determine the default distance from the center of the CDI to full left
or right limits:
• CDI scale = 1.25 nm - within 30 nm of any airport in the active route.
• CDI scale = 0.25 nm - on an approach leg or within 2 nm of the FAF or MAP.
• CDI scale = 5.0 nm - if the previous two conditions do not exist.
NOTE: If the CDI scale has been manually adjusted, it will not resume "auto"
scale until the auto scale aligns with the manual scale.
CDI AUTO-SWITCHING
Some external navigators have the ability to automatically switch CDI sources from
GPS to VLOC when flying a ILS, LOC, LDA, or SDF approach. This is indicated on the
HSI by a change in course pointer color from magenta to green. Additionally, the
external navigator may have the ability to automatically switch the LOC course pointer
when the CDI source change occurs. Reference the appropriate external navigator
documentation for more information.
TURN RATE INDICATOR
The Turn Rate Indicator is located above the HSI. Tick marks to the left and right of
the displayed heading denote 1/2 standard turn and standard turn rates (3 deg/sec). A
magenta Turn Rate Indicator shows the current turn rate. The end of the trend vector
gives the heading predicted in 6 seconds, based on the present turn rate. A standard-
rate turn is shown on the indicator by the trend vector stopping at the standard turn
rate tick mark, corresponding to a predicted heading of 18˚ from the current heading.
At rates greater than 4 deg/sec, an arrowhead appears at the end of the magenta
trend vector and the prediction is no longer valid.