Garmin GTN 625 User manual

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

ii GTN 625/635/650 Cockpit Reference Guide (CRG) 190-01004-04 Rev.C
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 feature is NOT intended to be used as a primary reference for
terrainavoidanceanddoesnotrelievethepilotfromtheresponsibilityof
beingawareofsurroundingsduringflight.TheTerrainProximityfeatureis
onlytobeusedasanaidforterrainavoidanceandisnotcertifiedforuse
inapplicationsrequiringacertifiedterrainawarenesssystem.Terraindata
isobtained fromthirdparty sources.Garminis notableto 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
monitoringand/orself-testcapabilityforallconceivablesystemfailuresis
notpractical.Althoughunlikely,itmaybepossibleforerroneousoperation
to occur without a fault indication shown by the GTN 625/635/650.It is
thustheresponsibilityofthepilottodetectsuchanoccurrencebymeans
of cross-checking with all redundant or correlated information available
in the cockpit.
WARNING: Thealtitude calculatedby GPSreceivers isgeometricheight
above Mean Sea Level and could vary significantly from the altitude
displayedbypressurealtimeters,suchastheoutputfromtheGDC74A/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: Donotuseoutdated databaseinformation.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that the information remains current.Pilots using an outdated database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
approvednavigationdata sources and should be consideredasan aid to
enhance situational awareness.

iii190-01004-04 Rev. C GTN 625/635/650 Cockpit Reference Guide (CRG)
Warnings, Cautions, and Notes
WARNING: Traffic information shown on the GTN 625/635/650 is
providedas an aid in visuallyacquiringtraffic.Pilotsmust maneuver the
aircraft based only upon ATC guidance or positive visual acquisition of
conflicting traffic.
WARNING: XM Weather should not be used for hazardous weather
penetration.WeatherinformationprovidedbytheGDL69/69Aisapproved
only for weather avoidance, not penetration.
WARNING: NEXRADweatherdataistobeusedforlong-rangeplanning
purposesonly.Duetoinherentdelaysindatatransmissionandtherelative
ageofthedata,NEXRADweatherdatashouldnotbeusedforshort-range
weather avoidance.
WARNING: Forsafetyreasons,GTN625/635/650operationalprocedures
must be learned on the ground.
WARNING: To reducetherisk of unsafeoperation,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,visualsightings,charts,etc.Forsafetypurposes,alwaysresolve
any discrepancies before continuing navigation.
WARNING: Never use the datalinked weather to attempt to penetrate
a thunderstorm.Both the FAAAdvisory Circular,Subject:Thunderstorms,
andtheAirman’sInformationManual(AIM)recommendavoiding“byat
least20milesanythunderstormidentifiedassevereorgivinganintense
radar echo.”
CAUTION: TheUnitedStatesgovernmentoperatestheGlobalPositioning
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
utilizeGPSasaprecisionelectronicNAVigationAID(NAVAID).Therefore,
as with all NAVAIDs, information presented by the GTN can be misused
or misinterpreted and,therefore, become unsafe.

iv GTN 625/635/650 Cockpit Reference Guide (CRG) 190-01004-04 Rev. C
Warnings, Cautions, and Notes
CAUTION: TheGTN625/635/650doesnotcontainanyuser-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
specialanti-reflectivecoatingthatisverysensitivetowaxesandabrasive
cleaners. CLEANERS CONTAINING AMMONIA WILL HARM THE ANTI-
REFLECTIVE COATING. It is very important to clean the display using a
clean,lint-freeclothandaneyeglasslenscleanerthatisspecifiedassafe
for anti-reflective coatings.
CAUTION: Garmin would like to remind pilots flying with
GDL 69/69A-equipped aircraft that TFRs are only advisory and Garmin
wouldliketoremindpilotsflyingwithGDL69/69A-equippedaircraftthat
TFRsareonlyadvisoryandarenotareplacementforathoroughpreflight
briefing on TFR times and locations. Always confirm TFR data through
official sources and contact your Flight Service Station for interpretation
ofTFR data.
NOTE: All visual depictions contained within this document, including
screenimagesoftheGTN625/635/650bezelanddisplays,aresubjectto
changeandmaynotreflectthemostcurrentGTN625/635/650software.
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.
NOTE: Terrain data is not displayedwhenthe aircraft latitude is greater
than 75°North or 60°South.
NOTE: Thisproduct,itspackaging,anditscomponentscontainchemicals
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
additionalinformation,pleaserefertoourwebsiteatwww.garmin.com/
prop65.

v190-01004-04 Rev. C 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.

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

1190-01004-04 Rev. C GTN 625/635/650 Cockpit Reference Guide (CRG)
Introduction
INTRODUCTION
This cockpit reference guide (CRG) is intended to serve as a quick reference
coveringthebasicfeaturesandoperatingproceduresfortheGTN625/635/650.
Fordetaileddescriptionsofanyinformationfoundinthisguide,refertothelatest
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
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. C
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
Selecting a NAV/COM Frequency using Rotary Knobs
Turn or momentarily press the1. small knob once to highlight the STBY
field of COM or NAV. The knob function defaults to COM after 30
seconds of inactivity.
Turn the2. large knob to the desired MHz value.
Turn the3. small knob to the desired kHz value.
Press the4. small knob to confirm entry.

3190-01004-04 Rev. C GTN 625/635/650 Cockpit Reference Guide (CRG)
GPS/NAV/COM
Touchscreen Entry
NOTE:
*
designatesfunctionsthatareaccomplishedbytouching.
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.
*
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.
Frequency Flip/Flop
To flip/floptheactiveandstandbyNAV/COMfrequencies,touchandholdthe
small knob or touch the active NAV/COM frequency field. An annunciation,
Hold for Flip-Flop, will be displayed near the knobs.

4 GTN 625/635/650 Cockpit Reference Guide (CRG) 190-01004-04 Rev. C
Transponder
TRANSPONDER
Transponder Control
Squawk Code Field
Transponder
Mode
Active
Transponder
*
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
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. Mode S
interrogations will be allowed.GND displays in the squawk
code field.
On: Touch to turn transponder On for ModeA 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.