Garmin G3X Touch Manual

G3X Pilot’s Guide
™

SYSTEM OVERVIEW
FLIGHT INSTRUMENTS
EIS
CNS INTERFACE
GPS NAVIGATION
FLIGHT PLANNING
HAZARD AVOIDANCE
ADDITIONAL FEATURES
INTEGRATED AUTOPILOT
ANNUNCIATIONS & ALERTS
APPENDIX
INDEX

Copyright © 2009 - 2011 Garmin Ltd. or its subsidiaries. All rights reserved.
This manual reflects the operation of System Software version 0006.20 or later. Some differences
in operation may be observed when comparing the information in this manual to earlier or later
software versions.
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Toll free: 800/800.1020 or 866/739.5687 Tel: [phone] Fax: [phone]
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Tel: [phone] Fax: [phone]
Web Site Address: www.garmin.com
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further that any unauthorized commercial distribution of this manual or any revision hereto is
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®
, FliteCharts
®
, SafeTaxi
®
, and MapSource
®
are registered trademarks of Garmin Ltd. or its
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™
is a trademark of Garmin Ltd. or its subsidiaries. These trademarks may not be
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®
is a registered trademark of Jeppesen, Inc.
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™
is a trademark of Jeppesen, Inc.
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is a registered trademark of SiriusXM Satellite Radio, Inc.
SiriusXM
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October 2011 190-01115-00 Rev. F Printed in the U.S.A.

Garmin G3X Pilot’s Guide
190-01115-00 Rev. F
Warnings, Cautions & Notes
WARNING: Navigation and terrain separation must NOT be predicated upon the
use of the terrain function. The G3X Terrain Proximity feature is NOT intended to
be used as a primary reference for terrain avoidance and does not relieve the pilot
from the responsibility of being aware of surroundings during flight. The Terrain
Proximity feature is only to be used as an aid for terrain avoidance and is not certified
for use in applications requiring a certified terrain awareness system. Terrain data
is obtained from third party sources. Garmin is not able to independently verify
the accuracy of the terrain data.
WARNING: To reduce the risk of unsafe operation,carefully review and understand
all aspects of the G3X Pilot’s Guide documentation and the Pilot’s Operating
Handbook of the aircraft. Thoroughly practice basic operation prior to actual use.
During flight operations, carefully compare indications from the G3X to all available
navigation sources, including the information from other NAVAIDs, visual sightings,
charts, etc. For safety purposes, always resolve any discrepancies before continuing
navigation.
WARNING: The displayed minimum safe altitudes (MSAs) are only advisory in
nature and should not be relied upon as the sole source of obstacle and terrain
avoidance information. Always refer to current aeronautical charts for appropriate
minimum clearance altitudes.
WARNING: The altitude calculated by G3X internal GPS receivers is geometric height
above Mean Sea Level and could vary significantly from the altitude displayed by
pressure altimeters. Always use pressure altitude displayed by the G3X PFD when
determining or selecting aircraft altitude.
WARNING: Do not use outdated database information.Databases used in the G3X
system must be updated regularly in order to ensure that the information remains
current. Pilots using any outdated database do so entirely at their own risk.
WARNING: XM Weather should not be used for hazardous weather penetration.
Weather information is approved only for weather avoidance, not penetration.
WARNING: NEXRAD weather data is to be used for long-range planning purposes
only. Due to inherent delays in data transmission and the relative age of the data,
NEXRAD weather data should not be used for short-range weather avoidance.
WARNING: The data contained in the terrain and obstacle databases comes from
government agencies. Garmin accurately processes and cross-validates the data,
but cannot guarantee the accuracy and completeness of the data.

Garmin G3X Pilot’s Guide
190-01115-00 Rev. F
Warnings, Cautions & Notes
WARNING: The illustrations in this guide are only examples. Never use the G3X
to attempt to penetrate a thunderstorm. Both the FAA Advisory Circular, Subject:
Thunderstorms, and the Aeronautical Information Manual (AIM) recommend
avoiding “by at least 20 miles any thunderstorm identified as severe or giving an
intense radar echo.”
WARNING: For safety reasons, G3X operational procedures must be learned on
the ground.
WARNING: Because of variation in the earth’s magnetic field, operating the G3X within
the following areas could result in loss of reliable attitude and heading indications. North
of 72° North latitude at all longitudes; South of 70° South latitude at all longitudes;
North of 65° North latitude between longitude 75° W and 120° W. (Northern Canada);
North of 70° North latitude between longitude 70° W and 128° W. (Northern Canada);
North of 70° North latitude between longitude 85° E and 114° E. (Northern Russia);
South of 55° South latitude between longitude 120° E and 165° E. (Region south of
Australia and New Zealand)
WARNING: The Garmin G3X has a very high degree of functional integrity. However,
the pilot must recognize that providing monitoring and/or self-test capability for all
conceivable system failures is not practical. Although unlikely, it may be possible
for erroneous operation to occur without a fault indication shown by the G3X. It is
thus the responsibility of the pilot to detect such an occurrence by means of cross-
checking with all redundant or correlated information available in the cockpit.
WARNING: The United States government operates the Global Positioning System
and is solely responsible for its accuracy and maintenance. The GPS system is subject
to changes which could affect the accuracy and performance of all GPS equipment.
Portions of the Garmin G3X utilize GPS as a precision electronic NAVigation AID
(NAVAID). Therefore, as with all NAVAIDs, information presented by the G3X can
be misused or misinterpreted and, therefore, become unsafe.
WARNING: Do not use basemap (land and water data) information for primary
navigation. Basemap data is intended only to supplement other approved
navigation data sources and should be considered as an aid to enhance situational
awareness.
WARNING: Do not use the approach information provided by the VFR navigation
database residing within the G3X as a means of navigating any instrument
approach. The G3XVFR navigation database is limited to present only the waypoints
for the final approach leg of a published procedure. These waypoints and associated
course line are made available for monitoring purposes only.

Garmin G3X Pilot’s Guide
190-01115-00 Rev. F
Warnings, Cautions & Notes
CAUTION: The display uses a lens coated with a special anti-reflective coating that
is very sensitive to skin oils, waxes, and abrasive cleaners. CLEANERS CONTAINING
AMMONIA WILL HARM THE ANTI-REFLECTIVE COATING. It is very important to
clean the lens using a clean, lint-free cloth and an eyeglass lens cleaner that is
specified as safe for anti-reflective coatings.
CAUTION: The Garmin G3X does not contain any user-serviceable parts. Repairs
should only be made by an authorized Garmin service center. Unauthorized repairs
or modifications could void both the warranty and the pilot’s authority to operate
this device under FAA/FCC regulations.
NOTE: All visual depictions contained within this document, including screen images
of the G3X panel and displays, are subject to change and may not reflect the most
current G3X system and aviation databases. Depictions of equipment may differ
slightly from the actual equipment.
NOTE: This product, its packaging, and its components contain chemicals known
to the State of California to cause cancer, birth defects, or reproductive harm. This
notice is being provided in accordance with California’s Proposition 65. If you have
any questions or would like additional information, please refer to our web site at
www.garmin.com/prop65.
NOTE: Interference from GPS repeaters operating inside nearby hangars can cause
an intermittent loss of attitude and heading displays while the aircraft is on the
ground. Moving the aircraft more than 100 yards away from the source of the
interference should alleviate the condition.
NOTE: Use of polarized eyewear may cause the flight displays to appear dim or
blank.
NOTE: Temporary Flight Restriction (TFR) data is provided by the FAA and may
not be updated outside of normal business hours. Confirm data currency through
alternate sources and contact your local FSS for interpretation of TFR data.
NOTE: The Garmin G3X system includes products like the GDU 37X and the GSU
73 that are not TSO-certified products and have not received FAA approval or
endorsement. Consequently the G3X system is not suitable for installation in
type-certificated aircraft.

Garmin G3X Pilot’s Guide
190-01115-00 Rev. F RR-1
Part Number Change Summary
190-01115-00 Initial release
Rev Date Description
A August,
2009
Production Release
B January,
2010
Added System Software Version 2.50 parameters
C March,
2010
System Software Version 2.50-2.60 changes:
• Added message to indicate if config module is missing
• Added warning text to Weight & Balance Page
D June, 2010 System Software Version 2.60-2.70:
• Added support for Integrated Autopilot control and display via the PFD
Page
• Added PFD Setup Menu
• Added second Bearing Pointer to PFD HSI
• Added fuel range ring to map
• Added menu option to XM Page to allow selection of a specific chan-
nel number
System Software Version 2.70-3.00:
• Added Synthetic Vision
• Added mach number to configurable Data Fields
E April,
2011
System Software Version 3.00-3.10:
• Added ability to import/export flight plans using the SD card
• Added Softkeys to Nearest Airports Page to quickly show/hide private
airports and heliports
• Removed ability to adjust Roll Mode reference using the FMS Joystick
System Software Version 3.10-3.20:
• Added ability to display checklist files from SD Card
• Added ability to log data to SD Card
• Added ability to export Track Log and User Waypoints to SD Card
• Added ability to display fuel calculator values in data bar
System Software Version 3.20-4.00:
• Added support for Jeppesen ChartView and geo-referenced FliteCharts
• Added ability to use VNAV when using an external GPS navigation
Source
• Added Softkey to Terrain Page to quickly enabled/disable terrain alerts
• Added display of Navaid frequency to PFD bearing pointer data fields

Garmin G3X Pilot’s Guide
190-01115-00 Rev. F
RR-2
Rev Date Description
E April,
2011
System Software Version 4.00-4.10:
• Added support for displaying flight time in databar
System Software Version 4.10 - 5.00 :
• Added support for VOR, localizer, and glideslope modes for integrated
autopilot
• Added option to display trim and flap position on PFD
• Added persistent sky/ground display to PFD
• Added ability to configure and display Vse (blue line) and Vmc (red
line) on PFD airspeed tape for multiengine aircraft
• Added ‘User Selected’ configuration option to allow the position of the
EIS strip to be changed via the Display Setup Page
• Added ability to view EGT/CHT cylinder temperature bar graph on a
single-display system
• Added automatic sync of altimeter setting to local terrain elevation
when FMS Joystick is pressed and held while BARO Softkey is selected
and aircraft is stationary on the ground
• Added display of displaced runway threshold distance to Airport
Review Page
• Added menu options to the Waypoint Page to quickly view the depar-
ture and destination airports
• Added menu option and softkey to the FPL VNAV Page to force a
capture of a VNAV profile
• Added Sirius/XM warning text
• Improved HSI localizer course auto-slew and localizer backcourse
presentation
System Software Version 5.0 - 5.10 :
• Added Fuel Flow to list of configurable data fields
System Software Version 5.10 - 6.00 :
• Added pathways
• Note about VPX Page
F October,
2011
System Software Version 6.00 - 6.10 :
• Added baro minimums altitude reference bug and audio alert to PFD
• Changed CRS Softkey on PFD Page to indicate which course it controls
(LOC, VOR, or OBS).

Garmin G3X Pilot’s Guide
190-01115-00 Rev. F RR-3
Rev Date Description
F October,
2011
System Software Version 6.10 - 6.20 :
• Added remote transponder interface information
• Added ability to switch between internal and external GPS flight plan
sources
• Added optional dedicated Traffic Page
• Added softkey to Map Page to enable/disable traffic display
• Added ability to enable/disable ‘Traffic Not Available’ audio alert
• Added ability to enable/diable traffic data on Synthetic Vision display
• Added ability to change the layout of PFD1 between full-screen and
split-screen in normal mode via the Display Setup Page
• Added arrows to PFD traffic and terrain messages to indicate traffic
and terrain alerts which are outside the Synthetic Vision field of view
• Added display of peak EGT temperature to bar graph display on Engine
Page when Lean Mode is active
• Added softkey to Terrain page
• Changed EGT gauge in EIS strip to display the cylinder with the tem-
perature closest to its own peak value when Lean Mode is active
• Changed AP NAV Softkey on PFD Page to cancel armed GS Mode on
the first press if GPS Mode is active and LOC and GS Modes are both
armed

Garmin G3X Pilot’s Guide
190-01115-00 Rev. F
RR-4
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Garmin G3X Pilot’s Guide
190-01115-00 Rev. F i
Table of Contents
Section 1 System Overview........................................................................... 1
1.1 Line Replaceable Units .............................................................................................1
G3X Standard Panel ............................................................................................................. 4
G3X Upgraded Panel............................................................................................................ 5
Split-Screen vs. Full-Screen Configurations ............................................................................ 6
External Navigators (Optional).............................................................................................. 6
Integrated Autopilot (Optional) ............................................................................................. 7
1.2 Display Overview ......................................................................................................8
1.3 Secure Digital (SD) Cards .........................................................................................9
1.4 G3X Controls............................................................................................................10
1.5 System Power-up ....................................................................................................12
1.6 System Operation ...................................................................................................13
Display Operation............................................................................................................... 13
PFD Display Configuration.................................................................................................. 16
G3X System Annunciations................................................................................................. 17
AHRS Operation................................................................................................................. 18
1.7 Accessing System Functionality.............................................................................19
Menus ............................................................................................................................... 19
Data Entry.......................................................................................................................... 21
Pages................................................................................................................................. 22
Main Page Softkeys ............................................................................................................ 27
Flight Planning Softkeys...................................................................................................... 37
Nearest Page Softkeys ........................................................................................................ 38
1.8 Accessing the Information (INFO) Page ................................................................39
Viewing GPS Receiver Status .............................................................................................. 39
Position.............................................................................................................................. 42
Data Fields and Layout (Full-Screen MFD) ........................................................................... 43
1.9 System Settings .......................................................................................................44
Transponder....................................................................................................................... 45
Data Bar Fields................................................................................................................... 46
Display............................................................................................................................... 48
Sound................................................................................................................................ 51
Units.................................................................................................................................. 52
Date & Time ....................................................................................................................... 53
Position.............................................................................................................................. 54
Alarms............................................................................................................................... 54
Setting Airport Criteria........................................................................................................ 56
Section 2 Flight Instruments........................................................................ 59
2.1 Flight Instruments...................................................................................................59
Airspeed Indicator.............................................................................................................. 62
Attitude Indicator............................................................................................................... 64
Altimeter............................................................................................................................ 65
Vertical Speed Indicator (VSI).............................................................................................. 69

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Table of Contents
Vertical Deviation Indicator and VNAV Indicator .................................................................. 69
Horizontal Situation Indicator (HSI) ..................................................................................... 71
Trim and Flap Position Indicators (optional)......................................................................... 82
Heading Strip and Turn Rate Indicator................................................................................. 82
OBS Mode ......................................................................................................................... 83
2.2 Supplemental Flight Data ......................................................................................84
Outside Air Temperature ..................................................................................................... 85
Wind Data ......................................................................................................................... 85
2.3 Vertical Navigation (VNAV) ....................................................................................86
Using the VNAV Feature ..................................................................................................... 87
Section 3 Engine Indication System ............................................................ 91
3.1 EIS Display & ENG Page..........................................................................................91
ENG Page Softkeys (Example Configuration) ....................................................................... 95
3.2 Lean Assist Mode (Optional) ..................................................................................95
3.3 Fuel Calculator (Optional) ......................................................................................98
Fuel Calculator Softkeys.................................................................................................... 100
Confirming Fuel Quantity.................................................................................................. 100
Confirm Fuel Quantity Softkeys......................................................................................... 101
3.4 CAS Messages (Optional) .....................................................................................102
Section 4 CNS Interface............................................................................. 105
4.1 Auto-tuning Frequencies (Optional)....................................................................105
4.2 Remote Transponder Interface (Optional)..........................................................107
Transponder Mode Selection............................................................................................. 110
Entering a Transponder Code............................................................................................ 112
IDENT Function ................................................................................................................ 113
Flight ID Reporting ........................................................................................................... 113
Section 5 GPS Navigation........................................................................... 115
5.1 Introduction...........................................................................................................115
Compass Arc.................................................................................................................... 115
5.2 Using Map Displays...............................................................................................116
Map Page Setup............................................................................................................... 117
Map Range...................................................................................................................... 121
Map Panning ................................................................................................................... 122
Fuel Range Ring............................................................................................................... 124
Measuring Bearing and Distance ...................................................................................... 125
Topography...................................................................................................................... 126
Satellite View ................................................................................................................... 127
Map Page Traffic............................................................................................................... 128
Map Symbols ................................................................................................................... 128

Garmin G3X Pilot’s Guide
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Table of Contents
5.3 Airways ..................................................................................................................130
5.4 Waypoints ..............................................................................................................132
Nearest Information ......................................................................................................... 137
Weather Information........................................................................................................ 139
Intersections .................................................................................................................... 140
NDBs................................................................................................................... 141
VORs................................................................................................................... 141
User Waypoints ................................................................................................................ 142
Automatic Waypoint Selection .......................................................................................... 146
5.5 Airspace..................................................................................................................147
Airspace Alert Messages................................................................................................... 148
Smart Airspace................................................................................................................. 148
5.6 Direct-to Navigation.............................................................................................149
Section 6 Flight Planning............................................................................ 153
6.1 Introduction...........................................................................................................153
Flight Plan Data Fields...................................................................................................... 154
Manually Switching Between Internal and External Flight Plan Sources.............................. 155
Failure of the External GPS Navigation Source................................................................... 156
6.2 Flight Plan Creation ..............................................................................................157
6.3 Flight Plan Storage ...............................................................................................159
6.4 Flight Plan Activation ...........................................................................................160
6.5 Flight Plan Editing.................................................................................................161
Adding Waypoints to an Existing Flight Plan...................................................................... 161
Editing Flight Plan Speed, Fuel, and/or Name.................................................................... 163
Copying Flight Plans......................................................................................................... 165
Deleting Flight Plans ........................................................................................................ 165
Inverting a Flight Plan ...................................................................................................... 167
Importing/Exporting Flight Plans....................................................................................... 168
6.6 Approaches ............................................................................................................168
Selecting an Approach...................................................................................................... 170
Activating Vectors-to-Final................................................................................................ 172
Section 7 Hazard Avoidance....................................................................... 175
7.1 XM®Satellite Weather..........................................................................................175
XM Datalink Weather Advisory ......................................................................................... 175
Activating Services ........................................................................................................... 176
XM Satellite Weather Products.......................................................................................... 176
Using XM Satellite Weather Products................................................................................ 187
7.2 Terrain ....................................................................................................................191
Synthetic Vision................................................................................................................ 192
Terrain Information........................................................................................................... 192
Terrain Views.................................................................................................................... 193
Terrain Settings ................................................................................................................ 194

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iv
Table of Contents
Terrain Alerts.................................................................................................................... 196
7.3 Traffic Information Service (TIS) (Optional)........................................................199
System Status................................................................................................................... 199
Traffic Symbology ............................................................................................................. 199
Traffic Annunciations ........................................................................................................ 200
Traffic Ground Track ......................................................................................................... 203
Displaying Traffic Data ...................................................................................................... 203
Dedicated Traffic Page (TRF).............................................................................................. 204
Section 8 Additional Features.................................................................... 207
8.1 Synthetic Vision (SVX) ..........................................................................................208
Synthetic Vision Operation................................................................................................ 209
8.2 SafeTaxi®...............................................................................................................220
SafeTaxi Cycle Number and Revision................................................................................. 221
8.3 ChartView ..............................................................................................................222
Aircraft Symbol................................................................................................................. 224
Chart Range..................................................................................................................... 225
Jeppesen Database-published NOTAMs ............................................................................ 225
8.4 FliteCharts®...........................................................................................................226
Aircraft Symbol................................................................................................................. 228
Chart Range..................................................................................................................... 228
FliteCharts Cycle Number and Expiration Date .................................................................. 229
8.5 Airport Directory Data..........................................................................................229
8.6 SiriusXM®Radio Entertainment (Optional) .........................................................231
Activating XM Satellite Radio Services .............................................................................. 231
Using SiriusXM Radio........................................................................................................ 232
8.7 Electronic Checklists (Optional)...........................................................................236
8.8 Flight Data Logging ..............................................................................................236
Section 9 Integrated Autopilot (Optional)................................................ 237
9.1 Integrated Autopilot Operation ..........................................................................238
Controls........................................................................................................................... 238
G3X Autopilot Status Box ................................................................................................. 241
Integrated Autopilot Modes.............................................................................................. 243
9.2 Vertical Modes.......................................................................................................244
Pitch Hold Mode (PIT)....................................................................................................... 245
Selected Altitude Capture mode (ALTS) ............................................................................. 246
Altitude Hold Mode (ALT) ................................................................................................. 247
Vertical Speed Mode (VS) ................................................................................................. 249
Vertical Navigation Mode (VNAV)..................................................................................... 251
Glidepath Mode (GP) (WAAS Only)................................................................................... 256
Glideslope Mode (GS)....................................................................................................... 257

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Table of Contents
9.3 Lateral Modes........................................................................................................260
Roll Hold Mode (ROL)....................................................................................................... 261
Heading Mode (HDG)....................................................................................................... 262
GPS, VOR & LOC Modes ................................................................................................... 263
Approaches without Vertical Guidance.............................................................................. 268
Approaches with Lateral + Vertical Guidance.................................................................... 271
Coupled Approach............................................................................................................ 275
9.4 Integrated Autopilot Alerts .................................................................................276
Section 10 Annunciations & Alerts ............................................................ 277
10.1 Miscellaneous Message Advisories ...................................................................277
10.2 System Status Messages (INFO Page) ...............................................................279
10.3 Aural Alerts..........................................................................................................284
10.4 PFD Annunciations and Alerting Functions.......................................................284
External Navigator Messages (Optional)............................................................................ 284
CAS Messages (Optional) ................................................................................................. 285
Terrain Annunciations....................................................................................................... 287
Traffic Annunciations ........................................................................................................ 288
Integrated Autopilot Alerts (Optional) ............................................................................... 288
Section 11 Appendices............................................................................... 291
Appendix A: Data Field Options.................................................................................291
Appendix B: Utilities ...................................................................................................297
Flight Log......................................................................................................................... 297
Track Log ......................................................................................................................... 299
Heading Line.................................................................................................................... 303
Weight & Balance ............................................................................................................ 304
EPE Circle ........................................................................................................................ 306
Proximity Waypoints ......................................................................................................... 306
Appendix C: SD Card Use and Databases..................................................................309
Installing and Removing SD Cards .................................................................................... 309
G3X Databases ................................................................................................................ 310
Updating G3X Databases ................................................................................................. 313
Exporting Track Logs and User Waypoints.......................................................................... 315
Importing/Exporting Flight Plans....................................................................................... 316
Flight Data Logging.......................................................................................................... 316
Appendix D: Map Datum and Location Formats ......................................................317
Map Datums.................................................................................................................... 317
Location Formats.............................................................................................................. 317
Appendix E: General TIS Information........................................................................319
TIS vs. TAS/TCAS............................................................................................................... 319
TIS Limitations ................................................................................................................. 319

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Table of Contents
Appendix F: Abnormal Operation..............................................................................323
Loss of GPS Position......................................................................................................... 323
Hazard Display with Loss of GPS Position.......................................................................... 323
G3X System Failure Annunciations.................................................................................... 324
Unusual Attitudes............................................................................................................. 325
Reversionary Mode (Full-Screen)....................................................................................... 325
Failure of the External GPS Navigation Source................................................................... 326
Synthetic Vision Troubleshooting....................................................................................... 327
Appendix G: Display Symbols ....................................................................................329
VFR Symbols .................................................................................................................... 329
IFR Symbols ..................................................................................................................... 330
Airspace Symbols ............................................................................................................. 332
Appendix H: Glossary..................................................................................................335
Appendix I: License Agreement and Warranty .........................................................341
Contact Garmin................................................................................................................ 341
Software License Agreement............................................................................................. 341
Limited Warranty.............................................................................................................. 341
AOPA Airport Directory Notice .......................................................................................... 342
SiriusXM Satellite Radio Service Agreement ....................................................................... 343
Weather Data Warranty .................................................................................................... 343

Garmin G3X Pilot’s Guide
190-01115-00 Rev. F 1
System Overview
System
Overview
Flight
Instruments EIS
CNS
Interface
GPS
Navigation
Flight
Planning
Hazard
Avoidance
Additional
Features
Integrated
Autopilot Annun/Alerts Appendix Index
SECTION 1 SYSTEM OVERVIEW
The G3X System presents flight instrumentation, position, navigation,
communication, and identification information to the pilot using 7” Wide VGA
(800x480) flat-panel color display(s).
1.1 LINE REPLACEABLE UNITS
The system is distributed across the following Line Replaceable Units (LRUs):
• Garmin Display Unit (GDU) 375 (with XM)
– Single Display: Split Primary Flight Display (PFD) & Multi Function Display (MFD)
– Multiple Displays: MFD (recommended)
• GDU 370 (without XM)
– Single Display: Split Primary Flight Display (PFD) & Multi Function Display (MFD)
– Multiple Displays: MFD, PFD, or split-screen
GDU 37X

Garmin G3X Pilot’s Guide
190-01115-00 Rev. F
2
System Overview
System
Overview
Flight
InstrumentsEIS
CNS
Interface
GPS
Navigation
Flight
Planning
Hazard
Avoidance
Additional
Features
Integrated
AutopilotAnnun/AlertsAppendixIndex
• GSU 73
–Garmin Sensor Unit sub-system for the G3X (Air Data Computer (ADC), Engine/
Airframe Unit, and the Attitude and Heading Reference System (AHRS))
– ADC: Processes data from the pitot-static system and outside air tem-
perature (OAT) sensor.
– Engine/Airframe Unit: Receives and processes signals from the engine
and airframe sensors.
– AHRS: Provides aircraft attitude and heading information to the PFD.
The AHRS contains advanced sensors (including accelerometers and rate
sensors) and interfaces with the Magnetometer to obtain magnetic field
information, with the ADC to obtain air data, and with the GDU to obtain
GPS information. AHRS operation is discussed later in this section.
GSU 73