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Garmin GNC 420 Quick Reference

Manual is about: Garmin Pilot's Guide and Reference

Summary of GNC 420

  • Page 1

    Gnc 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 (procedures) com power/ volume com flip-flop clr (clear) ent (enter) menu rng (map range) direct-to 1 2 3 4 5 6 7 8 9 10 1...

  • 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-t...

  • Page 4

    Gnc 420/420a quick reference power on 4 190-00140-21 rev. F 3) once the self-test concludes, the database versions page appears which shows the current database information on the navdata® card and terrain data cards. Press the ent key to acknowledge the database page and proceed to the instrument p...

  • Page 5

    Gnc 420/420a quick reference 190-00140-21 rev. F frequency selection 5 selecting a frequency: 1) turn the large left knob to select the desired megahertz (mhz) value. For example, the ‘135’ portion of the frequency ‘135.325’. 2) turn the small left knob to select the desired kilohertz (khz) value. F...

  • Page 6

    Gnc 420/420a quick reference main page groups 6 190-00140-21 rev. F main page groups the gnc 420’s main pages are divided into four separate page groups: nav, wpt, aux, and nrst. Each page group is comprised of multiple pages. The page groups are selected using the large right knob. The individual p...

  • Page 7

    Gnc 420/420a quick reference 190-00140-21 rev. F direct-to navigation 7 aux page group the aux page group includes four pages. Flight planning utility setup 1 setup 2 note: the flight plan pages are selected by pressing the fpl key and using the small right knob to select the desired page. Nrst page...

  • Page 8

    Gnc 420/420a quick reference direct-to navigation 8 190-00140-21 rev. F selecting a direct-to destination from the map page: 1) select the map page from the nav page group. 2) press the small right knob to display a panning pointer. 3) turn the small and large right knobs to place the panning pointe...

  • Page 9

    Gnc 420/420a quick reference 190-00140-21 rev. F viewing airport information 9 selecting a nearby airport or a flight plan waypoint as a direct-to destination: 1) press the direct-to key. 2) turn the large right knob to highlight the nearest airport (nrst) or flight plan (fpl) field. 3) turn the sma...

  • Page 10

    Gnc 420/420a quick reference viewing airport information 10 190-00140-21 rev. F viewing airport information by facility name or city: 1) select the airport location page (see page 6). 2) press the small right knob to activate the cursor. 3) turn the large right knob to highlight the facility name (s...

  • Page 11

    Gnc 420/420a quick reference 190-00140-21 rev. F default nav page 11 default nav page course deviation indicator (cdi) user-selectable data fields active leg of flight plan to/from flag the following symbols are used on the default nav page (directly below the cdi), to depict the ‘active leg’ of a f...

  • Page 12

    Gnc 420/420a quick reference map page 12 190-00140-21 rev. F 4) turn 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 key to select the desired data item and return to the default n...

  • 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 page displayed, press the menu key to display an options menu. 2) turn the large right knob to highlight ‘change fields?’ and press the ent key. 3) turn the large right...

  • Page 14

    Gnc 420/420a quick reference navcom page 14 190-00140-21 rev. F inhibiting terrain: 1) select the terrain page and press the menu key. ‘inhibit terrain?’ is selected by default. 2) press the ent key. The ‘ter inhb’ annunciation is displayed in the terrain annunciator field when terrain is inhibited....

  • Page 15

    Gnc 420/420a quick reference 190-00140-21 rev. F nearest airports 15 scrolling through the list of frequencies: 1) activate the cursor, if not already active, by pressing the small right knob. 2) turn the large right knob to move the cursor through the list of frequencies. If there are more frequenc...

  • Page 16

    Gnc 420/420a quick reference nearby airports 16 190-00140-21 rev. F viewing additional information for a nearby airport: 1) highlight the identifier of the desired airport by scrolling through the list, as described in the preceding procedure. 2) press the ent key to display the airport location pag...

  • Page 17

    Gnc 420/420a quick reference 190-00140-21 rev. F flight plans 17 creating a new flight plan: 1) press the fpl key and turn the small right knob to display the flight plan catalog page. 2) press the menu key to display the flight plan catalog page menu. 3) turn the large right knob to highlight ‘crea...

  • Page 18

    Gnc 420/420a quick reference select an approach 18 190-00140-21 rev. F editing a flight plan: 1) press the fpl key and turn the small right knob to display the flight plan catalog page. 2) press the small right knob to activate the cursor. 3) turn the large right knob to highlight the desired flight...

  • Page 19

    Gnc 420/420a quick reference 190-00140-21 rev. F activate an approach 19 5) turn 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. This allows the pilot to continue navi...

  • Page 20

    Gnc 420/420a quick reference flying 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 key to display the procedures page. 2) turn the large right knob to highlight ‘activate vector-to-final?’ and pre...

  • Page 21

    Gnc 420/420a quick reference 190-00140-21 rev. F flying the missed approach 21 • a ‘start 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 procedure turn. The procedure turn is displayed on the map page, b...

  • Page 22

    Garmin international, inc. 1200 east 151st street olathe, ks 66062, u.S.A. P: 913.397.8200 f: 913.397.8282 garmin at, inc. 2345 turner 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 park southampton, so40 9rb, u...