Garmin GNC 420 Quick Reference
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Garmin GNC 420 Quick Reference

Garmin GNC 420 Quick Reference

Garmin gnc 420: quick reference
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  • Page 2: Keys And Knobs

    ) is used to select between the various pages within one of the groups listed above. Press this knob momentarily to display the on-screen cursor. The cursor allows you to enter data and/or make a selection from a list of options. KEYS AND KNOBS Range (map scale) Direct-To Clear Large right knob GNC 420 Menu Enter Small right knob...
  • Page 3 The NRST key ( ) displays the nearest airports page. Then, rotat- ing the small right knob ( ) steps through the NRST pages. The OBS key ( ) is used to select manual or automatic sequencing of waypoints. Pressing the OBS key selects OBS mode, which will retain the current “active to”...
  • Page 4 User Selectable Data field The GNC 420’s display is divided into three separate “windows” (or screen areas). The left 1/4 of the display provides a COM window (top two lines) and a user-defined data field below. The right 3/4 of the display con- sists of a GPS window for the various navigation, waypoint information and settings pages.

  • Page 5: Page Selection

    (Small right knob to select pages within the group) NAV Group Default NAV WPT Group Airport Runway Airport Frequency Airport Location AUX Group Utility Flight Planning NRST Group Nearest Intersection Nearest Airport Page selection NAVCOM Satellite Status Position Airport Approach Airport Arrival Airport Departure Selection of any main page is performed using the large (...

  • Page 6: Direct-To Navigation

    Direct-TO Navigation...

  • Page 7: Airport Information

    Airport Information The GNC 420’s auto-tune feature allows you to quickly select any dis- played database COM frequency as your standby frequency. With a mini- mum of keystrokes, any frequency listed on the airport frequency page can be transferred to the standby field of the COM window. (NAV fre-...

  • Page 8: Default Nav Page

    Course Deviation Indicator (CDI) Active Leg of Flight Plan symbols are used (directly below the CDI) to depict the active leg of a flight plan or direct-to: Course to a Waypoint, or Desired Course between Two Waypoints Direct-To a Waypoint Left-hand Holding Pattern Right-hand Holding Pattern DME Arc to the left...

  • Page 9: Map Page

    Map Display 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 runway(s) only Private Airfield VOR/DME Localizer MAP PAGE User-selectable Data Fields Present...
  • Page 10 NavCom Page / Annunciators & Messages Frequency Category Usage Restriction Information The NAVCOM page provides a list of the airport communication and navigation frequencies at your departure, enroute and arrival airports. Departure, Enroute or Arrival Airport Assigned Frequency Scroll Bar CDI/RAIM Mode: Approach, Terminal or Enroute...

  • Page 11: Nearest Airports

    Nearest Airports...

  • Page 12: Flight Plans

    FLIGHT PLANS...
  • Page 13 Approaches Not all approaches in the database are approved for GPS use. As you select an approach, a “ G P S ” designation to the right of the procedure name indicates the procedure can be flown using the GPS receiver. Some pro- cedures will not have this designation, meaning the GPS receiver may be used for supplemental navigation guidance only.
  • Page 14 The “Activate Vector-To-Final?” option allows you to activate the final course segment of the approach. This option assumes you will receive vec- tors to the final approach fix (FAF) and guides you to intercept the final course, before reaching the FAF. APPROACHES Due to the variety of available approach procedures, the specific steps required will vary according to the approach selected.
  • Page 15 “INTEG” or “WARN” annunciation at the bottom left corner of the display (see page 10)—if protection limits cannot be maintained. If this occurs, the GPS receiver should not be used for primary naviga- tion guidance. Revert to an alternate navigation source, or select an alternate destination airport.
  • Page 16 © 1999-2000 GARMIN Corporation GARMIN International, Inc., 1200 East 151st Street, Olathe, KS 66062 GARMIN (Europe) LTD, Unit 5, The Quadrangle, Abbey Park Industrial Estate, Romsey, SO51 9AQ, U.K. GARMIN (Asia) Corp., No. 68, Jangshu 2 Road, Shijr, Taipei County, Taiwan Website Address: www.garmin.com...

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