Garmin GNC 420 Manuel d'utilisateur

GNC 420(A)Pilot’s Guide and Reference

GNC 420(A) Pilot’s Guide and Reference1-2SECTION 1 INTRODUCTION190-00140-20 Rev. K1.2 KEY AND KNOB FUNCTIONSThe GNC 420 is designed to make operatio

GNC 420(A) Pilot’s Guide and ReferenceSECTION 6 PROCEDURES6-167) The next point in the approach is an intermediate fix, labeled ‘D025G’. When approac

GNC 420(A) Pilot’s Guide and ReferenceSECTION 6 PROCEDURES6-1710) After crossing the FAF, the destination sequences to the MAP (‘RW22’, the runway

GNC 420(A) Pilot’s Guide and ReferenceSECTION 6 PROCEDURES6-18Selecting ‘VECTORS’ from the Transitions Window:1) Select Billard Municipal (KTOP)

GNC 420(A) Pilot’s Guide and ReferenceSECTION 6 PROCEDURES6-19DO NOT USE FOR NAVIGATIONFigure 6-52 Terminal ModeIn this example, we’ll assume AT

GNC 420(A) Pilot’s Guide and ReferenceSECTION 6 PROCEDURES6-20DO NOT USE FOR NAVIGATIONFigure 6-56 Approach ModeRefer to Figure 6-56 for the fo

GNC 420(A) Pilot’s Guide and ReferenceSECTION 6 PROCEDURES6-21Course From Fix Flight Plan LegsCertain approach, departure, and arrival procedures in t

GNC 420(A) Pilot’s Guide and ReferenceSECTION 6 PROCEDURES6-22Figure 6-62 Default NAV PageFigure 6-63 Map Page3) At 13.0 nm from the FAF, a w

GNC 420(A) Pilot’s Guide and ReferenceSECTION 6 PROCEDURES6-23Course from x to altitude legs show the specic target altitude on the Active Flight Pl

GNC 420(A) Pilot’s Guide and ReferenceSECTION 6 PROCEDURES6-243) Fly the outbound course. The Map Page depicts the flight path extending indefinitely

GNC 420(A) Pilot’s Guide and ReferenceSECTION 6 PROCEDURES6-25Course from x to manual sequence legs appear on the Active Flight Plan Page and the Map

GNC 420(A) Pilot’s Guide and Reference1-3SECTION 1 INTRODUCTION190-00140-20 Rev. KLeft-hand Keys and Knobs(1) COM Power/Volume Knob – Controls unit

GNC 420(A) Pilot’s Guide and ReferenceSECTION 6 PROCEDURES6-263) Fly the outbound course. Once cleared to sequence to the next leg, press the

GNC 420(A) Pilot’s Guide and Reference7-1SECTION 7 WPT PAGESSECTION 7: WPT PAGES7.1 WPT PAGE GROUPSection 2 introduced the GNC 420’s main page group

GNC 420(A) Pilot’s Guide and Reference7-2SECTION 7 WPT PAGESEntering a waypoint identifier:1) Select the desired WPT page and press the small righ

GNC 420(A) Pilot’s Guide and Reference7-3SECTION 7 WPT PAGESDuplicate WaypointsOnce the identier, facility name, or location is entered, all s

GNC 420(A) Pilot’s Guide and Reference7-4SECTION 7 WPT PAGES7.2 AIRPORT LOCATION PAGEThe Airport Location Page (Figure 7-8) displays the latit

GNC 420(A) Pilot’s Guide and Reference7-5SECTION 7 WPT PAGES7.3 AIRPORT RUNWAY PAGEThe Airport Runway Page (Figure 7-9) displays runway designations,

GNC 420(A) Pilot’s Guide and Reference7-6SECTION 7 WPT PAGESAdjusting the range of the map image:1) Press the down arrow of the RNG Key to disp

GNC 420(A) Pilot’s Guide and Reference7-7SECTION 7 WPT PAGES2) Turn the large right knob to scroll through the list, placing the cursor on the desire

GNC 420(A) Pilot’s Guide and Reference7-8SECTION 7 WPT PAGESThe following descriptions and abbreviations are used on the Airport Frequency Page:• Typ

GNC 420(A) Pilot’s Guide and Reference7-9SECTION 7 WPT PAGES3) Turn the small right knob to display a window of available approaches for the selected

GNC 420(A) Pilot’s Guide and Reference1-4SECTION 1 INTRODUCTION190-00140-20 Rev. K NOTE: Data is entered using the large and small right knob

GNC 420(A) Pilot’s Guide and Reference7-10SECTION 7 WPT PAGESAirport Approach Page OptionsThe available options for the Airport Approach Page, can b

GNC 420(A) Pilot’s Guide and Reference7-11SECTION 7 WPT PAGES7.6 AIRPORT ARRIVAL PAGEThe Airport Arrival Page (Figure 7-22) shows the availabl

GNC 420(A) Pilot’s Guide and Reference7-12SECTION 7 WPT PAGES7) Turn the small right knob to display a window of available runways (Figure 7-25). Co

GNC 420(A) Pilot’s Guide and Reference7-13SECTION 7 WPT PAGES7.7 AIRPORT DEPARTURE PAGEThe Airport Departure Page (Figure 7-27) shows the available

GNC 420(A) Pilot’s Guide and Reference7-14SECTION 7 WPT PAGESAirport Departure Page OptionsThe following option is available for the Airport De

GNC 420(A) Pilot’s Guide and Reference7-15SECTION 7 WPT PAGES7.9 NDB PAGEThe NDB Page displays the facility name, city, region/country, latit

GNC 420(A) Pilot’s Guide and Reference7-16SECTION 7 WPT PAGES7.11 USER WAYPOINT PAGEIn addition to the airport, VOR, NDB, and intersection informatio

GNC 420(A) Pilot’s Guide and Reference7-17SECTION 7 WPT PAGES3) Turn the large right knob to highlight the position field at the bottom of the page

GNC 420(A) Pilot’s Guide and Reference7-18SECTION 7 WPT PAGES7) Turn the large right knob to highlight ‘Create?’ (Figure 7-39) and press the ENT Key.

GNC 420(A) Pilot’s Guide and Reference7-19SECTION 7 WPT PAGES2) Press the ENT Key to capture the position and display the User Waypoint Page (

GNC 420(A) Pilot’s Guide and Reference1-5SECTION 1 INTRODUCTION190-00140-20 Rev. K1.3 TAKEOFF TOUROverviewThe Garmin GNC 420 provides the pil

GNC 420(A) Pilot’s Guide and Reference7-20SECTION 7 WPT PAGESModifying a user waypoint by changing reference waypoint information:1) With the User Wa

GNC 420(A) Pilot’s Guide and Reference7-21SECTION 7 WPT PAGESUser Waypoint Page OptionsThe following User Waypoint Page options are available by press

GNC 420(A) Pilot’s Guide and Reference7-22SECTION 7 WPT PAGESUser Waypoint ListThe User Waypoint List (Figure 7-49) allows the pilot to review,

GNC 420(A) Pilot’s Guide and Reference7-23SECTION 7 WPT PAGESDeleting a user waypoint from the User Waypoint List:1) Select the User Waypoint List, a

GNC 420(A) Pilot’s Guide and Reference7-24SECTION 7 WPT PAGESBlank Page190-00140-20 Rev. K

GNC 420(A) Pilot’s Guide and Reference8-1SECTION 8 NRST PAGESSECTION 8: NRST PAGES8.1 NRST PAGE GROUPSection 3.1 introduced the GNC 420’s main page

GNC 420(A) Pilot’s Guide and Reference8-2SECTION 8 NRST PAGESNot all nine nearest airports, VORs, NDBs, intersections, or user waypoints can be displa

GNC 420(A) Pilot’s Guide and Reference8-3SECTION 8 NRST PAGESNavigating to a Nearby WaypointThe NRST pages can be used in conjunction with the GNC 420

GNC 420(A) Pilot’s Guide and Reference8-4SECTION 8 NRST PAGES8.2 NEAREST AIRPORT PAGEThe Nearest Airport Page displays the identier, symbol, bearing

GNC 420(A) Pilot’s Guide and Reference8-5SECTION 8 NRST PAGES5) Press the COM Flip-flop Key to activate the selected frequency (Figure 8-11).Figure 8-

GNC 420(A) Pilot’s Guide and Reference1-6SECTION 1 INTRODUCTION190-00140-20 Rev. KThe Database Versions Page (Figure 1-5) appears next, which

GNC 420(A) Pilot’s Guide and Reference8-6SECTION 8 NRST PAGES8.3 NEAREST INTERSECTION PAGEThe Nearest Intersection Page (Figure 8-15) displays the

GNC 420(A) Pilot’s Guide and Reference8-7SECTION 8 NRST PAGES8.5 NEAREST VOR PAGEThe Nearest VOR Page (Figure 8-17) displays the identifier, s

GNC 420(A) Pilot’s Guide and Reference8-8SECTION 8 NRST PAGES8.7 NEAREST CENTER (ARTCC) PAGEThe Nearest Center Page (Figure 8-20) displays the

GNC 420(A) Pilot’s Guide and Reference8-9SECTION 8 NRST PAGES8.8 NEAREST FLIGHT SERVICE STATION (FSS) PAGEThe Nearest Flight Service Station Page (Fi

GNC 420(A) Pilot’s Guide and Reference8-10SECTION 8 NRST PAGES5) Press the ENT Key to place the selected frequency in the standby field of

GNC 420(A) Pilot’s Guide and Reference8-11SECTION 8 NRST PAGES• If the aircraft has entered an airspace, the message ‘Inside Airspace’ appears (Figur

GNC 420(A) Pilot’s Guide and Reference8-12SECTION 8 NRST PAGES3) Turn the large right knob to scroll through the list, highlighting the desired airsp

GNC 420(A) Pilot’s Guide and Reference8-13SECTION 8 NRST PAGES6) To return to the Airspace Page, turn the large right knob to highlight ‘Done?’ and p

GNC 420(A) Pilot’s Guide and Reference8-14SECTION 8 NRST PAGESBlank Page190-00140-20 Rev. K

GNC 420(A) Pilot’s Guide and Reference9-1SECTION 9 AUX PAGESSECTION 9: AUX PAGES9.1 AUX PAGE GROUPSection 3.1 introduced the GNC 420’s main p

GNC 420(A) Pilot’s Guide and Reference1-7SECTION 1 INTRODUCTION190-00140-20 Rev. KFigure 1-7 Fuel Flow Selected The Instrument Panel Self-test Page

GNC 420(A) Pilot’s Guide and Reference9-2SECTION 9 AUX PAGES9.2 FLIGHT PLANNING PAGEThe Flight Planning Page (Figure 9-4) provides access (via ‘menu

GNC 420(A) Pilot’s Guide and Reference9-3SECTION 9 AUX PAGESThe following menu options are available:• Fuel Planning - When equipped with fuel ow (F

GNC 420(A) Pilot’s Guide and Reference9-4SECTION 9 AUX PAGESFlight Planning Page: Fuel PlanningPerforming fuel planning operations:1) Select ‘Fuel Pl

GNC 420(A) Pilot’s Guide and Reference9-5SECTION 9 AUX PAGES5) If the fuel management system does not enter the data automatically, turn the large r

GNC 420(A) Pilot’s Guide and Reference9-6SECTION 9 AUX PAGESFuel planning figures can be entered and displayed based upon one of three possible

GNC 420(A) Pilot’s Guide and Reference9-7SECTION 9 AUX PAGES5) Turn the large right knob to highlight the departure time (DEP TIME) field.6) Use

GNC 420(A) Pilot’s Guide and Reference9-8SECTION 9 AUX PAGES4) The flashing cursor moves to the barometric pressure (BARO) field. Use the small and la

GNC 420(A) Pilot’s Guide and Reference9-9SECTION 9 AUX PAGES• Automatic Operation: If both units are set to automatic, a change in the active ight

GNC 420(A) Pilot’s Guide and Reference9-10SECTION 9 AUX PAGES• Active Flight Plan - Transfer the active ight plan to/from a second 400/500-series Ga

GNC 420(A) Pilot’s Guide and Reference9-11SECTION 9 AUX PAGES4) The flashing cursor moves to the type field under the new message (Figure 9-27). T

GNC 420(A) Pilot’s Guide and Reference1-8SECTION 1 INTRODUCTION190-00140-20 Rev. KSatellite Status PageThe Satellite Status Page (Figure 1-10) appear

GNC 420(A) Pilot’s Guide and Reference9-12SECTION 9 AUX PAGES9.3 UTILITY PAGEThe Utility Page (Figure 9-29) provides access (via menu options) to che

GNC 420(A) Pilot’s Guide and Reference9-13SECTION 9 AUX PAGES• RAIM Prediction - Predicts if GPS coverage is available for the current location or at

GNC 420(A) Pilot’s Guide and Reference9-14SECTION 9 AUX PAGESUtility Page: ChecklistsCreating a checklist:1) Select ‘Checklist’ from the Utility Page

GNC 420(A) Pilot’s Guide and Reference9-15SECTION 9 AUX PAGESInserting a checklist step into an existing checklist:1) With the Checklists Page displa

GNC 420(A) Pilot’s Guide and Reference9-16SECTION 9 AUX PAGES4) For a count down timer, turn the large right knob to highlight the time field. Use th

GNC 420(A) Pilot’s Guide and Reference9-17SECTION 9 AUX PAGESUtility Page: Trip StatisticsResetting trip statistics readouts:1) Select ‘Trip Statist

GNC 420(A) Pilot’s Guide and Reference9-18SECTION 9 AUX PAGES3) The flashing cursor moves to the arrival date field. Use the small and large right kno

GNC 420(A) Pilot’s Guide and Reference9-19SECTION 9 AUX PAGES4) Press the ENT Key to calculate sunrise and sunset times for the selected locat

GNC 420(A) Pilot’s Guide and Reference9-20SECTION 9 AUX PAGES9.4 SETUP 1 PAGEThe Setup 1 Page provides access (via menu options) to airspace alarms,

GNC 420(A) Pilot’s Guide and Reference9-21SECTION 9 AUX PAGESCDI Scales and Corresponding Flight Phases:OceanicEnrouteTerminalApproachFigure 9-54 CDI

GNC 420(A) Pilot’s Guide and Reference1-9SECTION 1 INTRODUCTION190-00140-20 Rev. KSelecting COM FrequenciesWhile the GNC 420 is acquiring a p

GNC 420(A) Pilot’s Guide and Reference9-22SECTION 9 AUX PAGES• ‘Position/Map Datum’ - Congures position readout information to the desired position

GNC 420(A) Pilot’s Guide and Reference9-23SECTION 9 AUX PAGES4) To change the altitude buffer, turn the large right knob to highlight the ‘Altitude B

GNC 420(A) Pilot’s Guide and Reference9-24SECTION 9 AUX PAGESSetting the arrival alarm and alarm distance:1) Select ‘CDI/Alarms’ from the Setup 1

GNC 420(A) Pilot’s Guide and Reference9-25SECTION 9 AUX PAGESChanging the units of measure:1) Select ‘Units/Mag Var’ from the Setup 1 Page, using the

GNC 420(A) Pilot’s Guide and Reference9-26SECTION 9 AUX PAGESDisplaying the map datum:1) Select ‘Position Format/Map Datum’ from the Setup 1 Page, us

GNC 420(A) Pilot’s Guide and Reference9-27SECTION 9 AUX PAGESRestoring Factory SettingsWhen making changes to any Setup 1 Page option, a ‘Restore Defa

GNC 420(A) Pilot’s Guide and Reference9-28SECTION 9 AUX PAGES2) Turn the large right knob to select the desired menu option (Figure 9-71), and press

GNC 420(A) Pilot’s Guide and Reference9-29SECTION 9 AUX PAGESSetup 2 Page: DisplayChanging the backlighting intensity:1) Select ‘Display’ from the Se

GNC 420(A) Pilot’s Guide and Reference9-30SECTION 9 AUX PAGESSetup 2 Page: Nearest Airport CriteriaSetting the minimum runway length and runway surfac

GNC 420(A) Pilot’s Guide and Reference9-31SECTION 9 AUX PAGESSetup 2 Page: Data Field ConfigurationConfiguring the Data Fields:1) Select ‘Data Field

GNC 420(A) Pilot’s Guide and Reference1-10SECTION 1 INTRODUCTION190-00140-20 Rev. KPage GroupsPage GroupsNAV Group WPT Group AUX Group NRST Groupsee

GNC 420(A) Pilot’s Guide and Reference9-32SECTION 9 AUX PAGES2) Turn the small right knob to select an option from the Auxiliary Configuration Wind

GNC 420(A) Pilot’s Guide and Reference10-1SECTION 10 TERRAINSECTION 10: TERRAIN NOTE: Not all GNC 420 units are equipped with or configured for TERR

GNC 420(A) Pilot’s Guide and Reference10-2SECTION 10 TERRAINTERRAIN Alerting TERRAIN uses information provided from the GPS receiver to provid

GNC 420(A) Pilot’s Guide and Reference10-3SECTION 10 TERRAIN10.2 TERRAIN PAGESee Section 3.5 for a complete description of the TERRAIN Page a

GNC 420(A) Pilot’s Guide and Reference10-4SECTION 10 TERRAIN10.3 TERRAIN ALERTSTERRAIN Alerts are issued when ight conditions meet parameters

GNC 420(A) Pilot’s Guide and Reference10-5SECTION 10 TERRAINTable 10-2 shows the possible TERRAIN alert types with corresponding annunciations.Alert T

GNC 420(A) Pilot’s Guide and Reference10-6SECTION 10 TERRAINTable 10-3 shows system status annunciations that may also be issued:Alert TypeTERRAIN Pag

GNC 420(A) Pilot’s Guide and Reference10-7SECTION 10 TERRAINPremature Descent Alerting A Premature Descent Alert (PDA) is issued when the system detec

GNC 420(A) Pilot’s Guide and Reference10-8SECTION 10 TERRAINTERRAIN NOT AVAILABLE ALERTTERRAIN requires a 3-D GPS navigation solution along with

GNC 420(A) Pilot’s Guide and Reference10-9SECTION 10 TERRAIN10.4 DATABASE INFORMATION FOR TERRAINGeneral Database InformationGarmin TERRAIN uses t

GNC 420(A) Pilot’s Guide and Reference1-11SECTION 1 INTRODUCTION190-00140-20 Rev. KMap PageAfter the GNC 420 acquires satellites and computes

GNC 420(A) Pilot’s Guide and Reference10-10SECTION 10 TERRAINDatabase UpdatesTerrain/obstacle databases are updated periodically with the latest t

GNC 420(A) Pilot’s Guide and Reference11-1SECTION 11 ADDITIONAL FEATURES190-00140-20 Rev. KSECTION 11: ADDITIONAL FEATURES CAUTION: The Weather Da

GNC 420(A) Pilot’s Guide and Reference11-2SECTION 11 ADDITIONAL FEATURES190-00140-20 Rev. KTIS displays up to eight trafc targets within 7 nautical

GNC 420(A) Pilot’s Guide and Reference11-3SECTION 11 ADDITIONAL FEATURES190-00140-20 Rev. Kcomes between the transponder antenna (usually located on

GNC 420(A) Pilot’s Guide and Reference11-4SECTION 11 ADDITIONAL FEATURES190-00140-20 Rev. KTIS Audio AlertingThe TIS audio alert is generated when th

GNC 420(A) Pilot’s Guide and Reference11-5SECTION 11 ADDITIONAL FEATURES190-00140-20 Rev. KFigure 11-4 Traffic Symbol ComponentsAltitudeDeviation Alt

GNC 420(A) Pilot’s Guide and Reference11-6SECTION 11 ADDITIONAL FEATURES190-00140-20 Rev. K• DATA FAIL - ‘DATA FAIL’ is displayed when data is being

GNC 420(A) Pilot’s Guide and Reference11-7SECTION 11 ADDITIONAL FEATURES190-00140-20 Rev. KFigure 11-11 Traffic Removed Banner• UNAVAIL - When a 60

GNC 420(A) Pilot’s Guide and Reference11-8SECTION 11 ADDITIONAL FEATURES190-00140-20 Rev. KTraffic Page Display RangeVarious display ranges can be

GNC 420(A) Pilot’s Guide and Reference11-9SECTION 11 ADDITIONAL FEATURES190-00140-20 Rev. KThumbnail Traffic on Map PageThe Map Page can display traf

GNC 420(A) Pilot’s Guide and Reference1-12SECTION 1 INTRODUCTION190-00140-20 Rev. K5) Press the ENT Key to confirm the identifier. The ‘Activate?’ fu

GNC 420(A) Pilot’s Guide and Reference11-10SECTION 11 ADDITIONAL FEATURES190-00140-20 Rev. KPower-Up TestThe TIS interface performs an automatic

GNC 420(A) Pilot’s Guide and Reference11-11SECTION 11 ADDITIONAL FEATURES190-00140-20 Rev. K11.2 GTS 8XX TRAFFIC SYSTEMSIntroductionAll information

GNC 420(A) Pilot’s Guide and Reference11-12SECTION 11 ADDITIONAL FEATURES190-00140-20 Rev. KPilots should be aware of TAS/TCAS system limitatio

GNC 420(A) Pilot’s Guide and Reference11-13SECTION 11 ADDITIONAL FEATURES190-00140-20 Rev. KAural AlertsA TA consists of a displayed trafc symbol (s

GNC 420(A) Pilot’s Guide and Reference11-14SECTION 11 ADDITIONAL FEATURES190-00140-20 Rev. KSwitching Between Standby and Operating ModesThe unit m

GNC 420(A) Pilot’s Guide and Reference11-15SECTION 11 ADDITIONAL FEATURES190-00140-20 Rev. KAltitude Display ModeThe GTS 8XX has four altitude

GNC 420(A) Pilot’s Guide and Reference11-16SECTION 11 ADDITIONAL FEATURES190-00140-20 Rev. KTraffic Warning WindowWhen the unit is not on the trafc p

GNC 420(A) Pilot’s Guide and Reference11-17SECTION 11 ADDITIONAL FEATURES190-00140-20 Rev. K10) Return to the Map Page by pressing the CLR Key.Thumb

GNC 420(A) Pilot’s Guide and Reference11-18SECTION 11 ADDITIONAL FEATURES190-00140-20 Rev. K11.3 WEATHER DATA LINK INTERFACEThis section is written

GNC 420(A) Pilot’s Guide and Reference11-19SECTION 11 ADDITIONAL FEATURES190-00140-20 Rev. KWeather ProductsThe following weather products are a

GNC 420(A) Pilot’s Guide and Reference1-13SECTION 1 INTRODUCTION190-00140-20 Rev. KNAV/COM PageFrom the Default NAV Page, turn the small right knob

GNC 420(A) Pilot’s Guide and Reference11-20SECTION 11 ADDITIONAL FEATURES190-00140-20 Rev. KNEXRAD IntensityColors are used to identify the diff

GNC 420(A) Pilot’s Guide and Reference11-21SECTION 11 ADDITIONAL FEATURES190-00140-20 Rev. KRequesting NEXRAD DataNEXRAD data can be requested f

GNC 420(A) Pilot’s Guide and Reference11-22SECTION 11 ADDITIONAL FEATURES190-00140-20 Rev. K• Auto Request (GDL 49 Only) - This eld is used to set

GNC 420(A) Pilot’s Guide and Reference11-23SECTION 11 ADDITIONAL FEATURES190-00140-20 Rev. KDisplaying NEXRAD Data on the Weather PageTo display NEXR

GNC 420(A) Pilot’s Guide and Reference11-24SECTION 11 ADDITIONAL FEATURES190-00140-20 Rev. KDisplaying NEXRAD Data on the Map PageWhen NEXRAD data is

GNC 420(A) Pilot’s Guide and Reference11-25SECTION 11 ADDITIONAL FEATURES190-00140-20 Rev. KThe pilot may use the ‘NEXRAD Off?’ and ‘NEXRAD On?’ eld

GNC 420(A) Pilot’s Guide and Reference11-26SECTION 11 ADDITIONAL FEATURES190-00140-20 Rev. KData Link Request Log Page (GDL 49 Only)The Data Link Req

GNC 420(A) Pilot’s Guide and Reference11-27SECTION 11 ADDITIONAL FEATURES190-00140-20 Rev. K• Auto Request - This eld is used to set the time

GNC 420(A) Pilot’s Guide and Reference11-28SECTION 11 ADDITIONAL FEATURES190-00140-20 Rev. K NOTE: Textual METARs can only be requested by identifie

GNC 420(A) Pilot’s Guide and Reference11-29SECTION 11 ADDITIONAL FEATURES190-00140-20 Rev. KRequesting graphical or textual METARs from the Map Page:

GNC 420(A) Pilot’s Guide and Reference1-14SECTION 1 INTRODUCTION190-00140-20 Rev. KIFR ProceduresOnce the direct-to or ight plan is conrmed, the wh

GNC 420(A) Pilot’s Guide and Reference11-30SECTION 11 ADDITIONAL FEATURES190-00140-20 Rev. KWeather Legend PageThe symbology unique to Graphical META

GNC 420(A) Pilot’s Guide and Reference11-31SECTION 11 ADDITIONAL FEATURES190-00140-20 Rev. KEntering an identifier:1) Select the Data Link Page. Hig

GNC 420(A) Pilot’s Guide and Reference11-32SECTION 11 ADDITIONAL FEATURES190-00140-20 Rev. KMonitoring the Data Link The Data Link Status Page p

GNC 420(A) Pilot’s Guide and Reference11-33SECTION 11 ADDITIONAL FEATURES190-00140-20 Rev. KThe GDL 69 Datalink Status Page shows the following fields

GNC 420(A) Pilot’s Guide and Reference11-34SECTION 11 ADDITIONAL FEATURES190-00140-20 Rev. KStandard Aviation Forecast AbbreviationsThe standard avia

GNC 420(A) Pilot’s Guide and Reference11-35SECTION 11 ADDITIONAL FEATURES190-00140-20 Rev. KCeiling and Visibility - Flight RulesVFR(green bars)Margi

GNC 420(A) Pilot’s Guide and Reference11-36SECTION 11 ADDITIONAL FEATURESTemp - Dewpoint Display Ranges(Blank) Unknown11°+(Green)7° - 10°(Green)0° - 6

GNC 420(A) Pilot’s Guide and ReferenceSECTION 12 – FAULT DETECTION AND EXCLUSION12-1SECTION 12: FAULT DETECTION AND EXCLUSIONFault Detection and Excl

GNC 420(A) Pilot’s Guide and ReferenceSECTION 12 – FAULT DETECTION AND EXCLUSION12-212.2 PRE-DEPARTURE VERIFICATION OF FDESince FDE is based upon the

GNC 420(A) Pilot’s Guide and ReferenceSECTION 13 – MESSAGES, ABBREVIATIONS, & NAV TERMS13-1SECTION 13: MESSAGES, ABBREVIATIONS, AND NAV TERMS13.1

GNC 420(A) Pilot’s Guide and Reference1-15SECTION 1 INTRODUCTION190-00140-20 Rev. KNearest (NRST) PagesThe NRST Page Group provides detailed informa

GNC 420(A) Pilot’s Guide and ReferenceSECTION 13 – MESSAGES, ABBREVIATIONS, & NAV TERMS13-2Message DescriptionApproaching VNAV profileThe aircraft

GNC 420(A) Pilot’s Guide and ReferenceSECTION 13 – MESSAGES, ABBREVIATIONS, & NAV TERMS13-3Message DescriptionCOM transmitter power has been reduc

GNC 420(A) Pilot’s Guide and ReferenceSECTION 13 – MESSAGES, ABBREVIATIONS, & NAV TERMS13-4Message DescriptionFPL has been truncatedThe flight plan

GNC 420(A) Pilot’s Guide and ReferenceSECTION 13 – MESSAGES, ABBREVIATIONS, & NAV TERMS13-5Message DescriptionInvalid FPL modificationAn attempt wa

GNC 420(A) Pilot’s Guide and ReferenceSECTION 13 – MESSAGES, ABBREVIATIONS, & NAV TERMS13-6Message DescriptionPoor GPS coverageThe GPS receiver ca

GNC 420(A) Pilot’s Guide and ReferenceSECTION 13 – MESSAGES, ABBREVIATIONS, & NAV TERMS13-7Message DescriptionStored data was lostAll user waypoin

GNC 420(A) Pilot’s Guide and ReferenceSECTION 13 – MESSAGES, ABBREVIATIONS, & NAV TERMS13-813.2 ABBREVIATIONSThe following is a list of abb

GNC 420(A) Pilot’s Guide and ReferenceSECTION 13 – MESSAGES, ABBREVIATIONS, & NAV TERMS13-9G/S Glideslopegl GallonsGPS Global Position

GNC 420(A) Pilot’s Guide and ReferenceSECTION 13 – MESSAGES, ABBREVIATIONS, & NAV TERMS13-10P.POS Present PositionPROC Procedure(s)PROV P

GNC 420(A) Pilot’s Guide and ReferenceSECTION 13 – MESSAGES, ABBREVIATIONS, & NAV TERMS13-1113.3 NAVIGATION TERMSThe following navigation terms a

GNC 420(A) Pilot’s Guide and Reference1-16SECTION 1 INTRODUCTION190-00140-20 Rev. KViewing additional information for a nearby airport:1) Press the

GNC 420(A) Pilot’s Guide and ReferenceSECTION 13 – MESSAGES, ABBREVIATIONS, & NAV TERMS13-12Term DescriptionEFF (efficiency)A measure of fuel consu

GNC 420(A) Pilot’s Guide and ReferenceAPPENDIX A DATA CARD USEA-1APPENDIX A: DATA CARD USEThe Jeppesen NavData Card, and the Terrain Data Card

GNC 420(A) Pilot’s Guide and ReferenceAPPENDIX A DATA CARD USEA-2Removing the NavData or Terrain Data Card (Figure A-2):1) Gently press on the tab—us

GNC 420(A) Pilot’s Guide and ReferenceAPPENDIX B SPECIFICATIONSB-1APPENDIX B: SPECIFICATIONSPHYSICALUnit Size: 6.25’W x 11.00’D x 2.65’H (159 m

GNC 420(A) Pilot’s Guide and ReferenceAPPENDIX B SPECIFICATIONSB-2Blank Page190-00140-20 Rev. K

GNC 420(A) Pilot’s Guide and ReferenceAPPENDIX C TROUBLESHOOTINGC-1APPENDIX C: TROUBLESHOOTING Q & AThis section is designed to answer some

GNC 420(A) Pilot’s Guide and ReferenceAPPENDIX C TROUBLESHOOTINGC-2What happens when I select an approach? Can I store a flight plan with an approach,

GNC 420(A) Pilot’s Guide and ReferenceAPPENDIX C TROUBLESHOOTINGC-3NORMAL (no ‘OBS’ annunciator)OBSAutomatic sequencing of waypointsManual sequencing-

GNC 420(A) Pilot’s Guide and ReferenceAPPENDIX C TROUBLESHOOTINGC-4When should I use the OBS key to return to auto sequencing, and what happens when I

GNC 420(A) Pilot’s Guide and ReferenceAPPENDIX C TROUBLESHOOTINGC-5When does turn anticipation begin, and what bank angle is expected?The GNC 420 smoo

GNC 420(A) Pilot’s Guide and Reference1-17SECTION 1 INTRODUCTION190-00140-20 Rev. KNearest (NRST) Airspace PageThe last page in the NRST Page

GNC 420(A) Pilot’s Guide and ReferenceAPPENDIX C TROUBLESHOOTINGC-6Why does my CDI not respond like a VOR when OBS mode is active?Unlike a VOR, the CD

GNC 420(A) Pilot’s Guide and ReferenceI-1INDEXAAbbreviations 7-4, 7-6, 7-8, 7-14, 7-15, 7-16, 13-8Accessories 1-1Activate an existing flight plan in

GNC 420(A) Pilot’s Guide and ReferenceI-2INDEXDesired track 1-11, 1-12, 3-3, 3-7, 5-8, 6-15, 6-24, 6-26, 9-3, 13-6, 13-11, 13-12Direct-to Cancelling

GNC 420(A) Pilot’s Guide and ReferenceI-3INDEXLocked waypoints 13-2MMagnetic variation 7-15, 9-21, 9-24Main page groups 8-1, 9-1Manual sequence 6-

GNC 420(A) Pilot’s Guide and ReferenceI-4INDEXRRadar coverage 7-4RAIM prediction 9-17RAIM protection limits 9-18Reference waypoint 3-20, 3-21, 3-2

GNC 420(A) Pilot’s Guide and ReferenceI-5INDEXVVectors-To-Final 3-3Vectors-to-final 6-17Vertical navigation 3-25, 13-1, 13-2, 13-10VNAV (Vertical Na

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190-00140-20 Rev. K© 2009 Garmin Ltd. or its subsidiariesGarmin International, Inc. 1200 East 151st Street Olathe, KS 66062, U.S.A. p: 913.397.820

GNC 420(A) Pilot’s Guide and Reference1-18SECTION 1 INTRODUCTION190-00140-20 Rev. KFlight Plans (FPL)The GNC 420 lets the pilot create up to 20 ight

GNC 420(A) Pilot’s Guide and Reference1-19SECTION 1 INTRODUCTION190-00140-20 Rev. K7) Repeat steps 5 and 6 until all waypoints for the flight plan h

GNC 420(A) Pilot’s Guide and Reference1-20SECTION 1 INTRODUCTION190-00140-20 Rev. KBlank Page

GNC 420(A) Pilot’s Guide and Reference2-1SECTION 2 COM190-00140-20 Rev. KSECTION 2: COM2.1 COMMUNICATING USING THE GNC 420The GNC 420 features a d

GNC 420(A) Pilot’s Guide and ReferenceiRECORD OF REVISIONSRevision Date of Revision DescriptionA 7/99 Initial ReleaseB 8/00 Revised and RedrawnC 5/03

GNC 420(A) Pilot’s Guide and Reference2-2SECTION 2 COM190-00140-20 Rev. KWhile receiving a station, an ‘RX’ indication (Figure 2-1) appears i

GNC 420(A) Pilot’s Guide and Reference2-3SECTION 2 COM190-00140-20 Rev. KAuto-TuningThe GNC 420’s auto-tune feature allows the pilot to quic

GNC 420(A) Pilot’s Guide and Reference2-4SECTION 2 COM190-00140-20 Rev. KSelecting a COM frequency for a nearby flight service station (FSS) or center

GNC 420(A) Pilot’s Guide and Reference2-5SECTION 2 COM190-00140-20 Rev. KSelecting a COM frequency for any airport in the database:1) Turn the larg

GNC 420(A) Pilot’s Guide and Reference2-6SECTION 2 COMStuck MicrophoneAs mentioned previously in this section, when the GNC 420 is transmitting, a ‘TX

GNC 420(A) Pilot’s Guide and ReferenceSECTION 3 NAV PAGES3-1190-00140-20 Rev. KSECTION 3: NAV PAGES 3.1 MAIN PAGE GROUPSThe GNC 420’s main page

GNC 420(A) Pilot’s Guide and ReferenceSECTION 3 NAV PAGES3-2190-00140-20 Rev. K3.2 NAV PAGE GROUPThe NAV Page Group includes seven pages (Fig

GNC 420(A) Pilot’s Guide and ReferenceSECTION 3 NAV PAGES3-3190-00140-20 Rev. K NOTE: The GNC 420 always navigates TO a waypoint unless the OBS

GNC 420(A) Pilot’s Guide and ReferenceSECTION 3 NAV PAGES3-4190-00140-20 Rev. KSelecting a different data item for any data field:1) Starting with th

GNC 420(A) Pilot’s Guide and ReferenceSECTION 3 NAV PAGES3-5190-00140-20 Rev. KRestoring Factory SettingsAll data eld settings can be quickly return

GNC 420(A) Pilot’s Guide and ReferenceiiCOPYRIGHTCopyright © 2009 Garmin Ltd. or its subsidiaries. All rights reserved.This manual reflects the operati

GNC 420(A) Pilot’s Guide and ReferenceSECTION 3 NAV PAGES3-6190-00140-20 Rev. KThe symbols in Table 3-3 are used to depict the various airports and N

GNC 420(A) Pilot’s Guide and ReferenceSECTION 3 NAV PAGES3-7190-00140-20 Rev. KThe ‘Setup Map?’ option (described in Section 3.4) allows the p

GNC 420(A) Pilot’s Guide and ReferenceSECTION 3 NAV PAGES3-8190-00140-20 Rev. KWhen the target pointer is placed on an object, the name of t

GNC 420(A) Pilot’s Guide and ReferenceSECTION 3 NAV PAGES3-9190-00140-20 Rev. KAirspace Information on the MapWhen a special-use or controlled a

GNC 420(A) Pilot’s Guide and ReferenceSECTION 3 NAV PAGES3-10190-00140-20 Rev. KMap SetupMany of the GNC 420’s functions are menu driven. Ea

GNC 420(A) Pilot’s Guide and ReferenceSECTION 3 NAV PAGES3-11190-00140-20 Rev. KChanging map orientation:1) From the Map Page Menu, turn the large r

GNC 420(A) Pilot’s Guide and ReferenceSECTION 3 NAV PAGES3-12190-00140-20 Rev. KAutomatic Zoom The automatic zoom feature automatically adjusts

GNC 420(A) Pilot’s Guide and ReferenceSECTION 3 NAV PAGES3-13190-00140-20 Rev. KDisplaying airspace boundaries, highways, roads, railroad lines, trac

GNC 420(A) Pilot’s Guide and ReferenceSECTION 3 NAV PAGES3-14190-00140-20 Rev. KTurning the data fields off/on: Turn the large right knob to highligh

GNC 420(A) Pilot’s Guide and ReferenceSECTION 3 NAV PAGES3-15190-00140-20 Rev. K3.5 TERRAIN PAGE NOTE: The TERRAIN Page does not appear on GNC 420

GNC 420(A) Pilot’s Guide and ReferenceiiiTABLE OF CONTENTS190-00140-20 Rev. KSECTION 1: INTRODUCTION ...1-11

GNC 420(A) Pilot’s Guide and ReferenceSECTION 3 NAV PAGES3-16190-00140-20 Rev. KTo display a 360˚ view:1) Select the TERRAIN Page and press the MENU

GNC 420(A) Pilot’s Guide and ReferenceSECTION 3 NAV PAGES3-17190-00140-20 Rev. KInhibit ModeTERRAIN has an inhibit mode that deactivates the F

GNC 420(A) Pilot’s Guide and ReferenceSECTION 3 NAV PAGES3-18190-00140-20 Rev. K3.6 NAV/COM PAGEThe NAV/COM (navigation communications) Page (Fi

GNC 420(A) Pilot’s Guide and ReferenceSECTION 3 NAV PAGES3-19190-00140-20 Rev. KScrolling through the list of frequencies:1) Activate the cursor,

GNC 420(A) Pilot’s Guide and ReferenceSECTION 3 NAV PAGES3-20190-00140-20 Rev. K3.7 POSITION PAGEThe Position Page displays the present positi

GNC 420(A) Pilot’s Guide and ReferenceSECTION 3 NAV PAGES3-21190-00140-20 Rev. K5) Press the ENT Key to select the desired data item and return to t

GNC 420(A) Pilot’s Guide and ReferenceSECTION 3 NAV PAGES3-22190-00140-20 Rev. K6) Press the ENT Key to select the desired type and return to the Po

GNC 420(A) Pilot’s Guide and ReferenceSECTION 3 NAV PAGES3-23190-00140-20 Rev. K3.8 SATELLITE STATUS PAGEThe Satellite Status Page provides a

GNC 420(A) Pilot’s Guide and ReferenceSECTION 3 NAV PAGES3-24190-00140-20 Rev. KEach satellite has a 30-second data transmission that must be collec

GNC 420(A) Pilot’s Guide and ReferenceSECTION 3 NAV PAGES3-25190-00140-20 Rev. K3.9 VERTICAL NAVIGATION PAGEThe GNC 420’s Vertical Navigation P

GNC 420(A) Pilot’s Guide and ReferenceivWARNINGS, CAUTIONS, AND NOTES WARNING: Navigation and terrain separation must NOT be predicated upon the use o

GNC 420(A) Pilot’s Guide and ReferenceSECTION 3 NAV PAGES3-26190-00140-20 Rev. K4) Turn the small right knob to select ‘Above Wpt’ (AGL) or ‘MS

GNC 420(A) Pilot’s Guide and ReferenceSECTION 3 NAV PAGES3-27190-00140-20 Rev. KWith the prole set, the vertical speed required (VSR) is displayed o

GNC 420(A) Pilot’s Guide and ReferenceSECTION 3 NAV PAGES3-28Blank Page190-00140-20 Rev. K

GNC 420(A) Pilot’s Guide and Reference4-1SECTION 4 DIRECT-TO NAVIGATION190-00140-20 Rev. KSECTION 4: DIRECT-TO NAVIGATION4.1 OVERVIEWThe GNC 420’

GNC 420(A) Pilot’s Guide and Reference4-2SECTION 4 DIRECT-TO NAVIGATION190-00140-20 Rev. KSelecting a Destination by Facility Name or CityIn addition

GNC 420(A) Pilot’s Guide and Reference4-3SECTION 4 DIRECT-TO NAVIGATION190-00140-20 Rev. KSelecting a direct-to destination from the active flight pla

GNC 420(A) Pilot’s Guide and Reference4-4SECTION 4 DIRECT-TO NAVIGATION190-00140-20 Rev. KShortcutsShortcuts are available when using the Direct-to K

GNC 420(A) Pilot’s Guide and Reference4-5SECTION 4 DIRECT-TO NAVIGATION190-00140-20 Rev. KSelecting a Direct-to destination from the Map PageDirect-t

GNC 420(A) Pilot’s Guide and Reference4-6SECTION 4 DIRECT-TO NAVIGATION190-00140-20 Rev. KSpecifying a Course to a WaypointWhen performing a direct-t

GNC 420(A) Pilot’s Guide and Reference5-1SECTION 5 FLIGHT PLANSSECTION 5: FLIGHT PLANSThe GNC 420 lets the pilot create up to 20 different ight plan

GNC 420(A) Pilot’s Guide and ReferencevWARNINGS, CAUTIONS, AND NOTES WARNING: Use the GNC 420, Weather Data Link Interface, TIS, and TERRAIN at your

GNC 420(A) Pilot’s Guide and Reference5-2SECTION 5 FLIGHT PLANS4) A blank Flight Plan Page appears for the first empty storage location (Figure 5-

GNC 420(A) Pilot’s Guide and Reference5-3SECTION 5 FLIGHT PLANSDeleting a waypoint from an existing flight plan:1) Press the FPL Key and turn the sm

GNC 420(A) Pilot’s Guide and Reference5-4SECTION 5 FLIGHT PLANSActivating Flight PlansOnce a ight plan is dened through the Flight Plan Catalog Page

GNC 420(A) Pilot’s Guide and Reference5-5SECTION 5 FLIGHT PLANSCopying Flight PlansTo save a ight plan currently located in ‘ight plan 00’,

GNC 420(A) Pilot’s Guide and Reference5-6SECTION 5 FLIGHT PLANSFlight Plan Catalog OptionsThe following options (some covered on the preceding pages)

GNC 420(A) Pilot’s Guide and Reference5-7SECTION 5 FLIGHT PLANS5) The ‘Cross-side’ field allows the pilot to designate the sending and recei

GNC 420(A) Pilot’s Guide and Reference5-8SECTION 5 FLIGHT PLANS• ‘Sort List By Number?’/’Sort List by Comment?’ - Allows the pilot to sort numerically

GNC 420(A) Pilot’s Guide and Reference5-9SECTION 5 FLIGHT PLANSActive Flight Plan Page Menu OptionsActivate LegActivates/reactivates the flight plan an

GNC 420(A) Pilot’s Guide and Reference5-10SECTION 5 FLIGHT PLANS The data elds for DTK and DIS are user-selectable and may be changed to display cum

GNC 420(A) Pilot’s Guide and Reference5-11SECTION 5 FLIGHT PLANSSelecting an approach for a direct-to or flight plan destination airport:1) Choose the

GNC 420(A) Pilot’s Guide and ReferenceviWARRANTYAVIATION LIMITED WARRANTYAll Garmin avionics products are warranted to be free from defects in materia

GNC 420(A) Pilot’s Guide and Reference5-12SECTION 5 FLIGHT PLANSSelecting an arrival for a direct-to or flight plan destination airport:1) Select the

GNC 420(A) Pilot’s Guide and Reference5-13SECTION 5 FLIGHT PLANSRemoving an approach, arrival, or departure from the active flight plan:1) Select the

GNC 420(A) Pilot’s Guide and Reference5-14SECTION 5 FLIGHT PLANSShortcutsA number of shortcuts are available to save time when using the Active Flight

GNC 420(A) Pilot’s Guide and Reference5-15SECTION 5 FLIGHT PLANSThe ‘Activate Leg?’ option is discussed previously in this section, which allow

GNC 420(A) Pilot’s Guide and Reference5-16SECTION 5 FLIGHT PLANSBlank Page190-00140-20 Rev. K

GNC 420(A) Pilot’s Guide and ReferenceSECTION 6 PROCEDURES6-1SECTION 6: PROCEDURES6.1 APPROACHES, DEPARTURES, AND ARRIVALSThe GNC 420 allows the pil

GNC 420(A) Pilot’s Guide and ReferenceSECTION 6 PROCEDURES6-25) Turn the large right knob to highlight ‘Load?’ or ‘Activate?’ (approaches only) and p

GNC 420(A) Pilot’s Guide and ReferenceSECTION 6 PROCEDURES6-3Another Procedures Page option allows the pilot to activate the final course segm

GNC 420(A) Pilot’s Guide and ReferenceSECTION 6 PROCEDURES6-4DO NOT USE FOR NAVIGATIONFigure 6-8 Sample ApproachSelect Destination‘Select’ and ‘Load’

GNC 420(A) Pilot’s Guide and ReferenceSECTION 6 PROCEDURES6-5The steps required to set up and y the approach are detailed below (refer to Fi

GNC 420(A) Pilot’s Guide and Reference1-1SECTION 1 INTRODUCTION190-00140-20 Rev. KSECTION 1: INTRODUCTION1.1 ACCESSORIES AND PACKING LISTCongratul

GNC 420(A) Pilot’s Guide and ReferenceSECTION 6 PROCEDURES6-6Flying the Procedure TurnFigure 6-13 Sample Approach with Procedure TurnDO NOT USE FOR

GNC 420(A) Pilot’s Guide and ReferenceSECTION 6 PROCEDURES6-7Figure 6-16 Waypoint Alert4) Fly the outbound course.5) Approximately one minute after

GNC 420(A) Pilot’s Guide and ReferenceSECTION 6 PROCEDURES6-811) After crossing the FAF, the destination sequences to the MAP (‘RW03’, the runway

GNC 420(A) Pilot’s Guide and ReferenceSECTION 6 PROCEDURES6-9The OBS Key is used to initiate the missed approach, as follows (refer to Figure 6-21 for

GNC 420(A) Pilot’s Guide and ReferenceSECTION 6 PROCEDURES6-10Flying an Approach with a HoldStarting where the previous example left off, assume w

GNC 420(A) Pilot’s Guide and ReferenceSECTION 6 PROCEDURES6-11Figure 6-29 Active Flight Plan PageDO NOT USE FOR NAVIGATIONFigure 6-30 Terminal M

GNC 420(A) Pilot’s Guide and ReferenceSECTION 6 PROCEDURES6-12 NOTE: If the pilot needs to lose extra altitude or speed by going around the holding

GNC 420(A) Pilot’s Guide and ReferenceSECTION 6 PROCEDURES6-1313) When approaching the FAF, a waypoint alert (‘NEXT DTK 209°’) appears in the lo

GNC 420(A) Pilot’s Guide and ReferenceSECTION 6 PROCEDURES6-14Flying a DME Arc ApproachThe GPS overlay for a DME arc approach uses additional

GNC 420(A) Pilot’s Guide and ReferenceSECTION 6 PROCEDURES6-15Figure 6-40 Approach WindowDO NOT USE FOR NAVIGATIONBillard Muni (Topeka, KS) VO