Garmin GTN 625 User manual

Map
Traffic
Terrain
Weather
Procedures
Default NAV
Waypoint Info
Nearest
Utilities
Services
GTN 625/635/650
Cockpit Reference Guide (CRG)
Flight Plan
System

ii GTN 625/635/650 Cockpit Reference Guide (CRG) 190-01004-04 Rev. E
Warnings, Cautions, and Notes
WARNING: Navigation and terrain separation must NOT be predicated upon
the use of the terrain function. The GTN 625/635/650 Terrain Proximity and
HTerrain 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: 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 Garmin GTN 625/635/650 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 GTN 625/635/650. 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 altitude calculated by GPS receivers is geometric height
above Mean Sea Level and could vary significantly from the altitude displayed
by pressure altimeters, such as the output from the GDC 74A/B Air Data
Computer, or other altimeters in aircraft. GPS altitude should never be used
for vertical navigation. Always use pressure altitude displayed by pressure
altimeters in the aircraft.
WARNING: Do not use outdated database information. Databases used in
the GTN 625/635/650 must be updated regularly in order to ensure that the
information remains current. Pilots using an outdated database do so entirely
at their own risk.
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.

iii190-01004-04 Rev. E GTN 625/635/650 Cockpit Reference Guide (CRG)
Warnings, Cautions, and Notes
WARNING: Traffic information shown on the GTN 625/635/650 is provided
as an aid in visually acquiring traffic. Pilots must maneuver the aircraft based
only upon ATC guidance or positive visual acquisition of conflicting traffic.
WARNING: SiriusXM 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: For safety reasons, GTN 625/635/650 operational procedures
must be learned on the ground.
WARNING: To reduce the risk of unsafe operation, carefully review and
understand all aspects of the GTN 625/635/650 Pilot’s Guide as well as this
guide. Thoroughly practice basic operation prior to actual use. During flight
operations, carefully compare indications from the GTN 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: Never use the datalinked weather to attempt to penetrate a
thunderstorm. Both the FAA Advisory Circular, Subject: Thunderstorms, and
the Airman’s Information Manual (AIM) recommend avoiding “by at least
20 miles any thunderstorm identified as severe or giving an intense radar
echo.”
WARNING: Do not use the indicated data link weather product age to
determine the age of the weather information shown by the data link weather
product. Due to time delays inherent in gathering and processing weather
data for data link transmission, the weather information shown by the data
link weather product may be significantly older than the indicated weather
product age.

iv GTN 625/635/650 Cockpit Reference Guide (CRG) 190-01004-04 Rev. E
Warnings, Cautions, and Notes
CAUTION: 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 GTN 625/635/650 utilize GPS as a
precision electronic NAVigation AID (NAVAID).Therefore, as with all NAVAIDs,
information presented by the GTN can be misused or misinterpreted and,
therefore, become unsafe.
CAUTION: The GTN 625/635/650 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.
CAUTION: The GTN 625/635/650 has a display that is coated with a special
anti-reflective coating that is very sensitive to waxes and abrasive cleaners.
CLEANERS CONTAINING AMMONIA WILL HARM THE ANTI-REFLECTIVE
COATING. It is very important to clean the display using a clean, lint-free
cloth and an eyeglass lens cleaner that is specified as safe for anti-reflective
coatings.
CAUTION: TFRs provided by the GDL 69/69A and GDL 88 datalink are only
advisory and not a replacement for a thorough preflight briefing onTFR times
and locations. Not all TFRs may be shown.Always confirm TFR data through
official sources.

v190-01004-04 Rev. E GTN 625/635/650 Cockpit Reference Guide (CRG)
Warnings, Cautions, and Notes
NOTE: Canadian Installations: In accordance with Canadian Radio
Specifications Standard 102 (RSS 102), RF field strength exposure to persons
from an antenna connected to this device should be limited to 60V/m for
controlled environment and 28 V/m for uncontrolled environment.
NOTE: Terrain data is not displayed when the aircraft latitude is greater
than 75°North or 60°South.
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: All visual depictions contained within this document, including screen
images of the GTN 625/635/650 bezel and displays, are subject to change
and may not reflect the most current GTN 625/635/650 software. Depictions
of equipment may differ slightly from the actual equipment.
NOTE: This device complies with part 15 of the FCC Rules. Operation is
subject to the following two conditions: (1) this device may not cause harmful
interference, and (2) this device must accept any interference received,
including interference that may cause undesired operation.

vi GTN 625/635/650 Cockpit Reference Guide (CRG) 190-01004-04 Rev. E
Record of Revisions
Part Number Revision Date Description
190-01004-04 A
B
C
D
E
Feb 2011
Mar 2011
Mar 2011
Nov 2012
Feb 2013
Initial Release
Updated message list.
Updated part number on back cover
only.
Added v3.00 functionality.
Added v4.00 functionality.

vii190-01004-04 Rev. E GTN 625/635/650 Cockpit Reference Guide (CRG)
INTRODUCTION................................................................................................. 1
Direct-To Navigation.................................................................................................................... 2
NAV/COM RADIO .............................................................................................. 3
Touchscreen Entry ....................................................................................................................... 3
Selecting a NAV/COM Frequency using Rotary Knobs ................................................................... 4
Frequency Flip/Flop...................................................................................................................... 4
TRANSPONDER ................................................................................................. 5
Transponder Control .................................................................................................................... 5
Special Squawk Codes................................................................................................................. 6
MAP .................................................................................................................. 7
Changing Data Fields .................................................................................................................. 8
Pan Mode ................................................................................................................................... 9
User Waypoints ........................................................................................................................... 9
Creating (or Editing) a Flight Plan in Pan Mode .......................................................................... 10
TRAFFIC .......................................................................................................... 11
Traffic System Status Annunciations ........................................................................................... 12
TERRAIN.......................................................................................................... 13
WEATHER ........................................................................................................ 15
SiriusXM® Weather (Optional) .................................................................................................. 15
FIS-B Weather ........................................................................................................................... 16
Stormscope®Weather (Optional)................................................................................................ 17
Connext Weather (Optional) ...................................................................................................... 18
DEFAULT NAV .................................................................................................. 19
FLIGHT PLAN .................................................................................................. 20
Creating a Flight Plan................................................................................................................ 20
Airways..................................................................................................................................... 21
Airway Selection for Waypoint.................................................................................................... 21
Flight Plan Menu....................................................................................................................... 22
PROCEDURES .................................................................................................. 23
Flying the Missed Approach ....................................................................................................... 24
Flying an Approach with a Hold ................................................................................................. 24
NEAREST......................................................................................................... 25
WAYPOINT INFO.............................................................................................. 26
Creating a User Waypoint .......................................................................................................... 27
SERVICES ........................................................................................................ 28
Phone ....................................................................................................................................... 28
Music........................................................................................................................................ 29
Position Reports ........................................................................................................................ 30
Contacts ................................................................................................................................... 31
UTILITIES......................................................................................................... 32

viii GTN 625/635/650 Cockpit Reference Guide (CRG) 190-01004-04 Rev. E
Vertical Calculator (VCALC) ....................................................................................................... 33
SYSTEM........................................................................................................... 34
Crossfill..................................................................................................................................... 35
SYMBOLS ........................................................................................................ 37
Map Symbols............................................................................................................................. 37
SafeTaxi™ Symbols................................................................................................................... 38
Traffic Symbols .......................................................................................................................... 38
Terrain Obstacle Symbols........................................................................................................... 40
Basemap Symbols...................................................................................................................... 41
Map Tool Bar Symbols ............................................................................................................... 41
Miscellaneous Symbols .............................................................................................................. 42
Stormscope® Symbols............................................................................................................... 43
MESSAGES ...................................................................................................... 44
GLOVE QUALIFICATION PROCEDURE .............................................................. 64
Tests Required for Glove Qualification........................................................................................ 65
Test Not Required for Glove Qualification................................................................................... 66

1190-01004-04 Rev. E GTN 625/635/650 Cockpit Reference Guide (CRG)
Introduction
INTRODUCTION
This cockpit reference guide (CRG) is intended to serve as a quick reference
covering the basic features and operating procedures for the GTN 625/635/650.
For detailed descriptions of any information found in this guide, refer to the latest
revision of the GTN 625/635/650 Pilot’s Guide, P/N 190-01004-03 found at
www.garmin.com.
Large
and Small
Knobs
Volume and
Squelch Knob
Active
COM/NAV
Frequency
Transponder
Field
Standby
COM/NAV
Frequency
Direct-To
Key
Photo Sensor
Home
Key
SD Card
Memory
Card Slot
Messages
Function
Icons
Locking
Screw
Touchscreen
Display
GTN 650 Front Panel/Main Page
Direct-To Key - Press to provide a direct course to a selected
waypoint.
Home Key - A single press of the Home Key returns the user
to the main page to access features. Pressing and holding the
HOME key while on any page will display the default NAV page.
Volume and Squelch Knob - Controls volume of the COM and
NAV radios. Press to use the IDENT function of the NAV radio.
Pressing and holding the volume knob will change the frequency
to emergency frequency.
Large and Small Knobs - Both are rotary knobs. The small
knob can be pressed and held in to flip-flop COM and NAV
frequencies.

2 GTN 625/635/650 Cockpit Reference Guide (CRG) 190-01004-04 Rev. E
Introduction
Direct-To Navigation
OR
Press the Direct-To key to quickly navigate from your present position directly
to a selected waypoint, flight plan waypoint, or nearest airport.
Direct-To a Waypoint
1. Press Direct-To.
2. Touch the Waypoint Identifier field and select the characters for the
desired waypoint with the large and small right knobs or the touch
keypad.
3. Touch Activate or press the small right knob. Text near the small
right knob indicates its current function.
Direct-To a Flight Plan Waypoint
OR
1. Press Direct-To.
2. Touch the FPL tab and then the desired Flight Plan waypoint.
3. Touch Activate or press the small right knob.
Direct-To a Nearest Airport
OR
1. Press Direct-To.
2. Touch the NRST APT tab and then the desired airport from the Nearest
Airport list. Touch the Up or Down keys as needed to show more of the
list.
3. Touch Activate or press the small right knob.

3190-01004-04 Rev. E GTN 625/635/650 Cockpit Reference Guide (CRG)
GPS/NAV/COM
NAV/COM RADIO
NOTE: The GTN 625/635/650 are all GPS/SBAS navigators. In addition, the
GTN 635 has COM functionality and the GTN 650 has COM/NAV functionality.
Standby COM
Frequency
Standby NAV
Frequency
Active COM
Frequency
Active NAV
Frequency
COM and NAV Radio Frequencies
Touchscreen Entry
NOTE:
G
designates functions that are accomplished by touching.
Cyan colored keys represent fields that can be modified, white colored keys
represent keys that change the state of operation for the related feature.
The COM or NAV frequency is changed by touching the STBY window and
using the keypad to enter the desired frequency. Touch Enter when finished or
Back to exit without making changes. If an entry was started, touch Cancel to
exit out of the screen without making changes.
G
COM Standby Screen
Mon: Monitors the standby COM frequency.
Find: Displays categories for User, Recent, Nearest, and Flight Plan
frequencies.
Xfer: Automatically enters the frequency to the active COM or NAV frequency
window.
NOTE: The NAV Standby screen is identical to the COM Standby screen except
that there is no MON key.

4 GTN 625/635/650 Cockpit Reference Guide (CRG) 190-01004-04 Rev. E
GPS/NAV/COM
Selecting a NAV/COM Frequency using Rotary Knobs
Press the center of the small right knob to change from the COM frequency
display to the NAV frequency display.
1. Turn or momentarily press the small knob once to highlight the STBY
field of COM or NAV. The knob function defaults to COM after 30
seconds of inactivity.
2. Turn the large knob to the desired MHz value.
3. Turn the small knob to the desired kHz value.
4. Press the small knob to confirm entry.
Frequency Flip/Flop
To flip/flop the active and standby NAV/COM frequencies, touch and hold the
small knob or touch the active NAV/COM frequency field. An annunciation,
Hold for Flip-Flop, will be displayed near the knobs.

5190-01004-04 Rev. E GTN 625/635/650 Cockpit Reference Guide (CRG)
Transponder
TRANSPONDER
Transponder Control
Squawk Code Field
Transponder
Mode
Active
Transponder
G
Transponder ID
Touch the Squawk Code Field to enter frequency for either Transponder 1
(XPDR1) or Transponder 2 (XPDR2).
IDENT
Touch IDENT to activate the transponder’s IDENT function. The key text
remains gray and will change to green when IDENT mode is active.
Current
Mode of
Transponder
Transponder Panel Page (Non-GDL 99 Installations with Mode C Transponder
Standby: Touch to place transponder in Standby mode. It is still
powered, but will not transmit information. STBY displays in the
squawk code field.
Ground: Touch to place transponder in Ground mode. Refer to the
documentation provided with your GTX transponder for specific
information on this mode of operation.
On: Touch to turn transponder On for Mode A operation. Will
transmit the squawk code when interrogated. ON displays in
the squawk code field.
Altitude
Reporting:
Touch for Mode C operation. The transponder will be on and
will transmit its squawk code and altitude when interrogated.
ALT displays in the squawk code field.
VFR: Touch to set the squawk code to 1200.
Enable ES: When a GTX 33/330 is connected, touch to enable the
extended squitter.

6 GTN 625/635/650 Cockpit Reference Guide (CRG) 190-01004-04 Rev. E
Transponder
Special Squawk Codes
The selected squawk code will always be in use. As you change a squawk
code, the original code will be sent until you are finished selecting the new code.
The table below lists special squawk codes:
Squawk Code Description
1200 Default VFR code in the USA
7500 Hijacking
7600 Loss of Communications
7700 Emergency
Special Squawk Codes
NOTE: While 1200 is the defaultVFR squawk code, the installer can configure
any code to the VFR key. This is to support international operations where
1200 may not be used.

7190-01004-04 Rev. E GTN 625/635/650 Cockpit Reference Guide (CRG)
Map
MAP
G
Map
Map Page
G G
Map Menu
Touch to select the overlays
(Terrain, TOPO, Airways,
NEXRAD, and Traffic) that are
displayed on the map page.
Touch to select the fields
that are displayed in the four
corners on the Map Screen.
Touch to restore the unit to
Garmin factory defaults.
Touch to select the map,
aviation, land, traffic, and
weather items that are
displayed on the map page.
Touch, hold and
slide to set how
much detail is
shown on the map
page.
Map Menu Options

8 GTN 625/635/650 Cockpit Reference Guide (CRG) 190-01004-04 Rev. E
Map
Changing Data Fields
The data fields located at each of the four corners of the Map page can be
configured to display any combination of four different navigation parameters.
To exit without changes to the Map page, touch Cancel.
G G G
Change NAV Data Fields
Selections Available for NAV Data Fields
BRG - Bearing to Current Waypoint
DIS - Distance to Current Waypoint
DIS to Dest - Distance to Destination
DTK - Desired Track
ESA - Enroute Safe Altitude
ETA - Estimated Time of Arrival
ETA at Dest - ETA at Destination
ETE - Estimated Time Enroute
ETE to Dest - ETE to Destination
Fuel Flow - Total Fuel Flow
Generic Timer - Timers (Utilities)
GS - GPS Ground Speed
GSL - GPS Altitude
MSA - Minimum Safe Altitude
OAT (static) - Static Air Temperature
OAT (total) - Total Air Temperature
Time - Current Time
TKE - Track Angle Error
Trip Timer - Timers (Utilities)
TRK - Track
VSR - Vertical Speed Required
Wind - Wind Speed and Direction
XTK - Cross Track Error
OFF - Do Not Display Data Field

9190-01004-04 Rev. E GTN 625/635/650 Cockpit Reference Guide (CRG)
Map
Pan Mode
NOTE: Annunciations for TIS Traffic Coasting or Traffic Removed are not
present while in pan mode. For more information refer to page 11.
To enter Pan Mode, touch the map anywhere on the Map page. Drag your
finger across the map to move it as desired. In Pan Mode, touch any symbol on
the map to highlight, then touch the information key to display any available
information related to that symbol. Touch the Next key to cycle to other waypoints
close to the cursor.
User Waypoints
Touch any location on the map that is not an existing waypoint to create a
user waypoint. The Waypoint Info key will display, “Create Waypoint” and
will display the “Create User Waypoint” page. See the “Waypoint Info, Creating
User Waypoint” section.
Cursor
Waypoint Info Key
Back
Key
Touch to create or edit flightplan.
Next
Key
To enter or edit a flight plan, touch the Graphically Edit FPL key. To leave
Pan Mode, touch the Back key.

10 GTN 625/635/650 Cockpit Reference Guide (CRG) 190-01004-04 Rev. E
Map
Creating (or Editing) a Flight Plan in Pan Mode
NOTE: It is not possible to graphically add an intermediate waypoint between
the current position and a direct-to waypoint unless that waypoint is in the
flight plan. Garmin recommends deleting any flight plan prior to graphically
editing a direct-to waypoint.
While in Pan Mode, touch the Graphically Edit FPL key to add/remove
waypoints and/or alter a course line in an existing flight plan. You can also enter
or edit an existing flight plan by touching the Flight Plan key on the home page.
See the Flight Plan section of this guide.
G
Edit Flight Plan
On the Map page, enter Pan Mode by touching the screen. Touch the
Graphically Edit FPL key. Touch any waypoint that you want to be part of
your flight plan. You also can touch and drag a flight plan line to a waypoint.
Should you make an error, touch the Undo key. The Undo key will reverse up
to the last nine consecutive edits. When finished, touch the Done key to save
your changes. Touch Cancel to leave the page without making any changes to
the flight plan.
Undo
Key
Touch to leave the page
without changes to the
flight plan.
Touch to confirm the
entries into the flight plan.
Flight Plan on Map Page

11190-01004-04 Rev. E GTN 625/635/650 Cockpit Reference Guide (CRG)
Tra󰈣c
TRAFFIC
G
Traffic
NOTE: Depending on which traffic device is installed and how it is configured,
the pages will be different that what is shown. Refer to the GTN 625/635/650
Pilot’s Guide, P/N 190-01004-03, for more information.
Touch to select Traffic
Mode. Selections are:
Operate and Standby.
Touch to activate
testing mode.
Touch to select the
altitude filter. Selections
are: Normal, Above,
Below, or Unrestricted.
Traffic Page
Traffic Page Options
Altitude Mode Displayed Traffic Range
Below -9900 ft to 2700 ft
Normal -2700 ft to 2700 ft
Above -2700 ft to 9900 ft
Unrestricted All Traffic Shown
The Test key places the traffic system in test mode. Not all traffic systems
support Test mode. There are no menu options for the traffic page.

12 GTN 625/635/650 Cockpit Reference Guide (CRG) 190-01004-04 Rev. E
Tra󰈣c
Traffic System Status Annunciations
For the symbol of the annuciations, refer to the section, “Symbols.”
TIS Failure Annunciations
Traffic Page
Annunciation Description
No Data Data is not being received from the transponder.
Failed The transponder has failed.
Unavailable TIS is unavailable or out of range.
TIS Traffic Status Annunciations
Traffic Status
Banner
Annunciation
Description
Traffic Coast 9 SEC
The displayed data is not current (6 to 12 seconds since
last message).
The quality of displayed traffic information is reduced
when this message is displayed.
Traffic Removed
Traffic is removed because it is too old for coasting (12
to 60 seconds since last message).
Traffic may exist within the selected display range, but it
is not displayed.
TAS Traffic Status Annunciations
Traffic Status
Banner
Annunciation
Description
TA 6.0 + 03 ↓
System cannot determine bearing of Traffic Advisory.
Annunciation indicates distance in NM, altitude
separation in hundreds of feet, and altitude trend arrow
(climbing/descending).
Failed Traffic data has failed.
Data Fail Data is being received from the transponder, but a failure
is detected in the data stream.
No Data Traffic has not been detected.