Garmin GNC 420AW manual

400W Series Quick Refer ence[...]

OBS Key Power and Com V olume/Squelch Photocell for Auto- Dimming Graphic Moving Map Display and Navigation Info Procedure Key Range Keys Enter Key Direct-T o Key Menu Key Clear Key Comm Freq Flip/Flop Nav Radio Freq Flip/Flop Nav Radio V olume Small Knob Com/VLOC Freq (kHz) Com Freq Window Small Knob (Cursor - Press to activate) Large Knob Aviatio[...]

1 Model Descriptions This guide covers the operation of the GPS 400W , GNC 420W , GNC 420A W , GNS 430W , and GNS 430A W . In general, all models will be referred to as the 400W -series , except where there ar e physical or operational differ ences. The 400W -series units are 6.25” wide and 2.66” high. The display is a 240-by-128 pixel color LC[...]

2 KEYS AND KNOBS Left-hand Keys and Knobs k In the GNC 420W and the GNS 430W , the COM power/volume knob controls unit power and communications radio volume. Press the knob momentarily to enable/disable automatic squelch control. j In the GNS 430W , the VLOC volume knob controls audio volume for the selected VOR/ Localizer frequency . Press momenta[...]

3 Right-hand Keys and Knobs R The range key ( RNG ) allows you to select the desired map scale. Press the up arr ow side of the key to zoom out or the down arrow side to zoom in. D The direct-to key allows you to enter a destination waypoint and establishes a direct course to the selected destination. m The menu key ( MENU ) displays a context- sen[...]

4 Bottom Row Keys GPS 400W GNC 420W GNS 430W N The nearest ( NRST) key (GPS 400W and GNC 420W only) displays the nearest airports page. Then, turning the small right knob steps through the NRST pages. C In the GNS 430W , the CDI key is used to toggle which navigation source (GPS or VLOC) provides output to an external HSI or CDI. O The omni-bearing[...]

5 POWER ON Powering on the Unit 1. T urn the COM power/volume knob clockwise to turn the unit on and set the desired radio volume . 2. T he Main and GPS softw are version page appears bri efly , fol lowe d by land and ter ra in data bas e pa ges , as the unit conducts self-tests to ensure proper operation. 3. Once the self-test concludes , databas[...]

6 Screen Layout (windows) COM Window GPS Window Active Fr equency on top & Standby on bottom (active window highlighted by cursor) { { VLOC Window { The 400W -series display is divided into four separate “windows” (or screen areas). The top left 1/4 of the display provides a COM window (top two lines) and a VLOC window (bottom two lines) Th[...]

7 P AGE SELECTION NRST Group Nearest Airport Nearest Inter section Nearest NDB Nearest VOR Nearest User Wpt Nearest Center Nearest FSS Nearest Airspace A UX Group Flight Planning Utility Setup 1 Setup 2 Airport Location WPT Group Airport Runway Airport Frequency Airport Ap proach Airport Arrival Airport Departur e Intersection NDB VOR User Waypoint[...]

8 Default NA V Page TO/FROM Flag Course Deviation Indicator (CDI) Active Leg of Flight Plan User -selectable Data Fields The following symbols are used (directly below the CDI) to depict the active leg of a flight plan or direct-to: Course to a W aypoint, or Desir ed Course between T wo W aypoints Dir ect-T o a W aypoint V ectors-T o-Final Left-ha[...]

9 MAP P AGE Map Page User -selectable Data Fields Map Display Pr esent Position Map Scale The following symbols are used to depict the various airports and navaids on the map page: Airport with hard surface runway(s); Primary runway shown Airport with soft surface r unway(s) only Private Air field Intersection VOR VOR T AC VOR/DME T ACAN DME NDB Lo[...]

10 NA VCOM Page The NA VCOM page provides a list of the airport com- munication and navigation frequencies at your departure, en route and arrival airports. Assigned Fr equency Fr equency Category Usage Restriction Information Scroll Bar Departur e, En Route or Arrival Airport T o Select a Frequency List for a Departure, En Route, or Arrival Airpor[...]

1 1 AIRPORT INFORMA TION Viewing Airport Information 1. F rom any page , pres s and hold CLR to select the default NA V page. (Y ou may skip this step if you are already viewing any of the main GPS pages .) 2. T urn the large right knob to select the WPT page group . “WPT” will appear in the lower right corner of the screen. 3. T urn the small [...]

12 T o Select a Direct-T o Destination 1. P r e s s t h e direct-to k ey . A Select Direct- T o Waypoint page will appear , with the waypoint identifier field highlighted. 2. Use the small and large right knobs to enter the identifier of the desired destination waypoint. 3. Press ENT to confirm the selected waypoint. Press ENT again to activate[...]

13 T o View a List of the Nearest Airports 1. F rom any pag e , pres s and hold the CLR k ey to sele ct the default NA V page . Y ou may skip this step if you are already viewing any of the main GPS pages . 2. T u r n t h e large right knob to select the NRST page group . “NRST” will appear in the lower right corner of the screen. 3. If necessa[...]

14 T o Create a New Flight Plan 1. Press the FPL k ey and turn the small right kno b to disp lay the fligh t plan catalog. 2. Press the MENU k ey to display the flight plan catalog options . 3. T urn the lar ge right knob to highlight “Create New Flight Plan?” and press the ENT k ey . 4. A blank flight plan page will appear for the first em[...]

15 APPROACHES Selecting Approaches In order to select an appr oach, you must first have an active direct-to or flight plan that termi- nates at an airport with a published approach. 1. Press the PROC key to display the procedures page . 2. T u r n t h e large right knob to highlight “Select Approach?” and press the ENT key . 3 . A window will[...]

16 Activating an Approach 1. Wi th an appr oac h load ed in the active flight plan, press the PROC k ey to display the procedures page . 2. T u r n t h e large right knob to highlight “ Activate Approach?”. 3. Press the ENT k ey . Activating an Approach with V ectors-T o-Final The “Activate V ector -T o-Final?” option allows you to activat[...]

17 APPROACHES maintained. If this occurs, the GPS receiver should not be used for primary navigation guidance. Revert to an alternate navigation source, or select an alternate desti- nation airport. LPV , LNA V+V , and L/VNA V approaches will downgrade to LNA V if GPS integrity cannot be met. There is no need to switch to guidance by other navigati[...]

18 Annunciation Description LPV F ollow lateral and vertical guidance to LPV minimums . A yellow background indicates the current VPL and/or HPL values are not adequate for the approach and is an early indication that downgrading will occur if conditions do not improve . L/VNA V GPS approach identified in the database as LNA V/VNA V . Fly to LNA V[...]

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