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GNC 420(A)
Pilot’s Guide and Reference
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RECORD OF REVISIONS Revision Date of Revision Description A 7/99 Initial Release B 8/00 Revised and Redrawn C 5/03 Added FDE Section, update for SW 4.0 D 8/06 Changed to 8 inch x 8.5 inch format. Added TERRAIN, TIS, Weather interface info, and misc. changes E 9/06 Corrected print spec, added Data Field Configuration info in Section 9 F 2/07 Updated per main SW v5.02 G 10/07 Updated per main SW v5.03 H 05/08 Removed Proximity Advisory info from Section 11 J 08/08 Converted format of figures to
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COPYRIGHT Copyright © 2009 Garmin Ltd. or its subsidiaries. All rights reserved. This manual reflects the operation of Main System Software version 5.03 or later. Some differences may be observed when comparing the information in this manual to other software versions. Garmin International, Inc., 1200 East 151st Street, Olathe, Kansas 66062 USA p: 913.397.8200 f: 913.397.8282 Garmin AT, Inc., 2345 Turner Road SE, Salem, Oregon 97302 USA p: 503.391.3411 f: 503.364.2138 Garmin (Europe)
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TABLE OF CONTENTS SECTION 1: INTRODUCTION ........................................... 1-1 SECTION 8: NRST PAGES ................................................. 8-1 1.1 Accessories and Packing List ................................. 1-1 8.1 NRST Page Group ..................................................... 8-1 1.2 Key and Knob Functions ......................................... 1-2 8.2 Nearest Airport Page ............................................... 8-4 1.3 Takeoff Tour ...........
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WARNINGS, CAUTIONS, AND NOTES WARNING: Navigation and terrain separation must NOT be predicated upon the use of the TerraiN function. The TerraiN feature is NOT intended to be used as a primary reference for terrain avoidance and does not relieve the pilot from the responsibility of being aware of surroundings during flight. The TerraiN feature is only to be used as an aid for terrain avoidance and is not certified for use in applications requiring a certified terrain awareness system.
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WARNINGS, CAUTIONS, AND NOTES WARNING: Use the GNC 420, Weather Data Link interface, TiS, and TerraiN at your own risk. To reduce the risk of unsafe operation, carefully review and understand all aspects of the GNC 420 Pilot’s Guide documenta- tion and the Flight Manual Supplement. Thoroughly practice basic operation prior to actual use. During flight operations, carefully compare indications from the GNC 420 to all available navigation sources, including the information from other NaVa
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WARRANTY AVIATION LIMITED WARRANTY All Garmin avionics products are warranted to be free from defects in materials or workmanship for: two years from the date of purchase for new Remote-Mount and Panel-Mount products; one year from the date of purchase for new portable products and any purchased newly-overhauled products; six months for newly-overhauled products exchanged through a Garmin Authorized Service Center; and 90 days for factory repaired or newly-overhauled products exchanged at Gar
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SECTION 1 INTRODUCTION The Garmin dealer installs and configures the GNC 420. SECTION 1: INTRODUCTION The GNC 420 is secured in the installation rack with the proper wiring connections. A Garmin dealer can answer any questions about the installation, such as location 1.1 ACCESSORIES AND PACKING LIST of antennas or any connections to other equipment in Congratulations on choosing the finest, most advanced the panel. After installation, the NavData Card and the panel mount IFR naviga
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SECTION 1 INTRODUCTION Experiment with the unit and refer to the reference 1.2 KEy AND KNOB FUNCTIONS sections for more information. The GNC 420 is designed to make operation as simple Data is entered using the large and small knobs. as possible. The key and knob descriptions (Figure Experiment with them to become efficient at entering data. 1-1) provide a general overview of the primary function(s) This greatly reduces the amount of time spent operating for each key and knob. The
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SECTION 1 INTRODUCTION Left-hand Keys and Knobs Right-hand Keys and Knobs (1) COM Power/Volume Knob – Controls unit power (3) CLR Key – Used to erase information, remove map and communications radio volume. Press momentarily to detail, or to cancel an entry. Press and hold the CLR Key disable automatic squelch control. to immediately display the Default NAV Page. (2) COM Flip-flop Key – Used to swap the active and (4) Direct-to Key – Allows the pilot to enter a destination standby COM fre
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SECTION 1 INTRODUCTION Bottom Row Keys NOTe: Data is entered using the large and small right knobs (Figure 1-2). experiment with (10) NRST Key – Displays the Nearest Airports Page. them to become efficient at entering data. This Then, turning the small right knob steps through the will greatly reduce the amount of time spent NRST pages. operating the GNC 420 in flight. (11) OBS Key – Selects OBS mode, which retains the current ‘active to’ waypoint as the navigation reference even a
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SECTION 1 INTRODUCTION After becoming familiar with the basics, some suggested 1.3 TAKEOFF TOUR reading within this Pilot’s Guide includes: Overview • Flight plan features - Section 5 The Garmin GNC 420 provides the pilot accurate • IFR procedures - Section 6 navigational data and communication capability, along • Waypoint information pages (database with non-precision and precision approach certification information) - Section 7 in the IFR environment. The takeoff tour is designed to •
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SECTION 1 INTRODUCTION The Database Versions Page (Figure 1-5) appears To ensure that the GNC 420 and any connected next, which shows the current database information instruments are working properly, check for the following on the NavData Card and Terrain Data cards. Database indications on the CDI/HSI , RMI, external annunciators, information highlighted in yellow indicates the database and other connected instruments: is not within its effective dates. The NavData database is • Course
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SECTION 1 INTRODUCTION Viewing the Checklists Page: 1) Turn the large right knob to highlight ‘Go To Chklist?’ (Figure 1-9) and press the ENT Key. Figure 1-7 Fuel Flow Selected The Instrument Panel Self-test Page includes selections to set fuel on board (FOB) to full capacity and access the Checklists Page. This allows the pilot to quickly set fuel Figure 1-9 ‘Go To Chklist?’ Highlighted to full limits and display any checklists that have been entered, such as start up or takeoff che
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SECTION 1 INTRODUCTION Viewing a system message: Satellite Status Page Press the MSG Key (Figure 1-11). The Satellite Status Page (Figure 1-10) appears as the GNC 420 attempts to collect satellite information. The Message Page appears and displays the status or An ‘Acquiring’ status is displayed on the Satellite Status warning information applicable to the receiver’s current Page, and the signal strengths of any satellites received operating condition. appear as ‘bar graph’ readings. Thi
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SECTION 1 INTRODUCTION Changing the standby communication Selecting COM Frequencies frequency: While the GNC 420 is acquiring a position, take a Turn the large left knob to select the MHz, minute to dial in the active and standby frequencies to and the small left knob to select the kHz of be used for the first phase of the flight. The GNC 420’s the desired frequency. display (Figure 1-12) is divided into separate windows (or screen areas), including a COM Window, data field Placing t
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SECTION 1 INTRODUCTION Page Groups NOTe: The NrST Page Group may be accessed by using the large right knob as described in the Page Groups preceding procedure or by pressing the NRST NAV Group WPT Group AUX Group NRST Group Key. see Section 3 see Section 7 see Section 9 see Section 8 NAV Pages Table 1-1 Page Groups There are seven pages available under the NAV Page The bottom right corner of the screen (Figure 1-14) Group*: indicates which page group (Table 1-1) is currently being • Def
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SECTION 1 INTRODUCTION To change the map range, press the up arrow (to zoom Map Page out) or the down arrow (to zoom in) of the RNG (map After the GNC 420 acquires satellites and computes range) Key. The current map range is depicted in the a position, the Map Page (Figure 1-15) appears lower left corner of the Map Display. automatically. Direct-to Navigation Map Display Desired Track Map Range Present Position Data Fields The GNC 420 can use direct point-to-point navigation to provide
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SECTION 1 INTRODUCTION 5) Press the ENT Key to confirm the identifier. The The Default NAV Page displays a graphic course ‘Activate?’ function field is highlighted (Figure deviation indicator (CDI), the active leg of the flight plan 1-17). (as defined by the current ‘from’ and ‘to’ waypoints), and six user-selectable data fields. The default settings for these fields are distance to waypoint (DIS), desired track (DTK), bearing to waypoint (BRG), ground speed (GS), ground track (TRK), an
