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Garmin GNC 420A manual

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Table of contents for the manual

  • Page 1

    G NC 420/420A Quick Reference[...]

  • Page 2

    GNC 420/420A Quick Reference KEYS AND KNOBS 2 190-00140-21 Rev . F Large left knob Large right knob Small left knob Small right knob NRST OBS MSG (message) FPL (flight plan) PROC (procedur es) COM Power/ V olume COM Flip-flop CLR (clear) ENT (enter) MENU RNG (map range) Direct-to 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 GNC 420 4 6 3 2 5 8 9 7 1 10[...]

  • Page 3

    GNC 420/420A Quick Reference 190-00140-21 Rev . F KEYS AND KNOBS 3 RIGHT -HAND KEYS AND KNOBS The RNG Key allows the pilot to select the desired map range. Press the up arrow to zoom out to a larger area, or the down arrow to zoom in to a smaller area. The Direct-to Key provides access to the direct-to function, which allows the pilot to enter a de[...]

  • Page 4

    GNC 420/420A Quick Reference POWER ON 4 190-00140-21 Rev . F 3) Once the self-test concludes , the Database V ersions P age appears which shows the current database information on the NavData® Card and T errain Data cards . Press the ENT K ey to acknowledge the Database P age and proceed to the Instrument P anel Self-test P age . 4) T he Instrumen[...]

  • Page 5

    GNC 420/420A Quick Reference 190-00140-21 Rev . F FREQUENCY SELECTION 5 Selecting a frequency: 1) T urn the large left knob to select the desired mega hertz (MHz) v alue . F or examp le , the ‘135’ portion of the frequency ‘135.325’. 2) T urn the small left knob to select the desired kilohertz (kHz) value . For example , the ‘.325’ port[...]

  • Page 6

    GNC 420/420A Quick Reference MAIN P AGE GROUPS 6 190-00140-21 Rev . F MAIN P A GE GROUPS The GNC 420’ s main pages are divided into four separate page groups: NA V , WPT , AUX, and NRST . Each page group is comprised of multiple pages. The page groups are selected using the large right knob. The individual pages are selected using the small right[...]

  • Page 7

    GNC 420/420A Quick Reference 190-00140-21 Rev . F DIRECT -TO NA VIGA TION 7 A UX P AGE GROUP The AUX Page Group includes four pages. F li g h t Planning Utility Setup 1 Setup 2 NO TE: The flight plan pages are selected by pressing the FPL K ey and using the small right knob to select the desired page . NRST P A GE GROUP The NRST Page Group include[...]

  • Page 8

    GNC 420/420A Quick Reference DIRECT -TO NA VIGA TION 8 190-00140-21 Rev . F Selecting a direct-to destination from the Map P age: 1 ) Select the Map P age from the NA V Page Group . 2) Press the small right knob to display a panning pointer . 3) T urn the small and large right knobs to place the panning pointer at the desired destination location. [...]

  • Page 9

    GNC 420/420A Quick Reference 190-00140-21 Rev . F VIEWING AIRPORT INFORMA TION 9 Selecting a nearby airport or a flight plan waypoint as a direct-to destination: 1) Press the Dir ect-to K ey . 2) T urn the large right knob to highlight the nearest airport (NRST) or flight plan (FPL) field. 3) T urn the small right knob to display a window listin[...]

  • Page 10

    GNC 420/420A Quick Reference VIEWING AIRPORT INFORMA TION 10 190-00140-21 Rev . F Viewing airport information by facility name or city: 1) Select the Airport Location P age (see page 6). 2) Press the small right knob to activate the cursor . 3) T urn the large right knob to highlight the facility name (second line) or the city (third line) field. [...]

  • Page 11

    GNC 420/420A Quick Reference 190-00140-21 Rev . F DEF AUL T NA V P AGE 11 DEF AUL T NA V P AGE Course Deviation Indicator (CDI) User -selectable Data Fields Active Leg of Flight Plan TO/FROM Flag The following symbols are used on the Default NA V Page (directly below the CDI), to depict the ‘active leg’ of a flight plan or direct to: Direct-to[...]

  • Page 12

    GNC 420/420A Quick Reference MAP P AGE 12 190-00140-21 Rev . F 4) T urn the small right knob to display the list of available data items . Continue turning the small right knob to select the desired data item from the list. 5) Press the ENT K ey to select the desired data item and return to the Default NA V Page . 6) Press the small right knob mome[...]

  • Page 13

    GNC 420/420A Quick Reference 190-00140-21 Rev . F FULL SCREEN MAP 13 Selecting a different data item for any data field: 1) With Map P age displayed, press the MENU K ey to display an options menu. 2) T urn the large right knob to highlight ‘Change Fields?’ and press the ENT K ey . 3) T urn the large right knob to highlight the data field to [...]

  • Page 14

    GNC 420/420A Quick Reference NA VCOM P AGE 14 190-00140-21 Rev . F Inhibiting TERRAIN: 1) Select the TERRAIN Page and press the MENU K ey . ‘Inhibit T err ain?’ is selected by default. 2) Press the ENT K ey . T he ‘TER INHB’ annunciation is displayed in the TERRAIN annunciator field when TERRAIN is inhibited. Annunciator Field NOTE: Inhibi[...]

  • Page 15

    GNC 420/420A Quick Reference 190-00140-21 Rev . F NEAREST AIRPORTS 15 Scrolling through the list of fr equencies: 1) Activate the cursor , if not already active , by pressing the small right knob . 2) T urn the large right knob to move the cursor through the list of frequencies . If there are more frequencies in the list than can be displayed on th[...]

  • Page 16

    GNC 420/420A Quick Reference NEARBY AIRPORTS 16 190-00140-21 Rev . F Viewing additional information for a nearby airport: 1) Highli ght the identifi er of the desire d airport by scrolling through the list, as described in the preceding procedure . 2 ) Press the ENT K ey to display the Airport Location P age for the selected airport. 3) T o view a[...]

  • Page 17

    GNC 420/420A Quick Reference 190-00140-21 Rev . F FLIGHT PLANS 17 Creating a new flight plan: 1) Press the FPL K ey and turn the small right knob to display the Flight Plan Catalog P age . 2) Press the MENU Key to display the Flight Plan Catalog P age Menu. 3) T urn the large right knob to highlight ‘Create New Flight Plan?’ and press the ENT [...]

  • Page 18

    GNC 420/420A Quick Reference SELECT AN APPROACH 18 190-00140-21 Rev . F Editing a flight plan: 1) Press the FPL K ey and turn the small right knob to display the Flight Plan Catalog P age . 2) Press the small right knob to activate the cursor . 3) T urn the large right knob to highlight the desired flight plan and press the ENT K ey . 4) T o add [...]

  • Page 19

    GNC 420/420A Quick Reference 190-00140-21 Rev . F ACTIV A TE AN APPROACH 19 5) T urn the large right knob to highlight ‘Load?’ or ‘ Activate?’ and press the ENT Key . (‘Load?’ adds the procedure to the flight plan without immediately using it for navigation guidance. T his allows the pilot to continu e navigatin g the original flight [...]

  • Page 20

    GNC 420/420A Quick Reference FL YING AN APPROACH 20 190-00140-21 Rev . F Activating the approach with vectors to final: 1) With an approach loaded in the active flight plan, press the PROC K ey to display the Procedures P age . 2) T urn the large right knob to highlight ‘ Activ ate V ector -T o-Final?’ and press the ENT K ey . GUIDELINES FOR [...]

  • Page 21

    GNC 420/420A Quick Reference 190-00140-21 Rev . F FL YING THE MISSED APPROACH 21 • A ‘ST AR T PROC TRN’ prompt will appear in the lower right corner of the display to advise the pilot when the aircraft is at a safe distance to initiate a procedur e turn. The procedure turn is displayed on the Map Page, but guidance through the turn itself is [...]

  • Page 22

    Garmin International, Inc. 1200 East 151st Street Olathe , KS 66062, U.S .A. p: 913.397.8200 f: 913.397.8282 Garmin A T , Inc. 2345 T urner Road SE Salem, OR 97302, U .S.A. p: 503.391.3411 f: 503.364.2138 Garmin (Europe) Ltd. Liberty House , Bulls Copse Road Hounsdown Business P ark Southampton, SO40 9RB, U.K. p: +44/ (0) 870.8501241 f: +44/ (0) 87[...]