Garmin GNC 420W Pilots Guide

Garmin GNC 420W Manual

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  • Garmin GNC 420W | Pilots Guide - Page 1
    GNC 420(A) Pilot's Guide and Reference
  • Garmin GNC 420W | Pilots Guide - Page 2
  • Garmin GNC 420W | Pilots Guide - Page 3
    08 J 08/08 K 12/09 Description Initial Release Revised and Redrawn Added FDE Section, update for SW 4.0 Changed to 8 inch x 8.5 inch format. Added TERRAIN, TIS, Weather added Data Field Configuration info in Section 9 Updated per main SW v5.02 Updated per main SW v5.03 Removed Proximity Advisory
  • Garmin GNC 420W | Pilots Guide - Page 4
    ™, and Spell'N'Find™ are trademarks of Garmin Ltd. or its subsidiaries and may not be used without the express permission of Garmin. NavData® is a registered trademark of Jeppesen, Inc. December 2009 190-00140-20 Rev. K ii GNC 420(A) Pilot's Guide and Reference Printed in the U.S.A. 190
  • Garmin GNC 420W | Pilots Guide - Page 5
    COM 2-1 2.1 Communicating Using the GNC 420 7.11 User Waypoint Database Information for TERRAIN 10-9 SECTION 11: ADDITIONAL FEATURES 11-1 11.1 Traffic Information Service Use A-1 Appendix B: Specifications B-1 Appendix C: Troubleshooting Q & A C-1 190-00140-20 Rev. K GNC 420(A) Pilot's Guide
  • Garmin GNC 420W | Pilots Guide - Page 6
    displayed by pressure altimeters in aircraft. GPS altitude should never be used for vertical navigation. Always use pressure altitude displayed by pressure altimeters in the aircraft. WARNING: The Jeppesen database used in the GNC 420 system must be updated regularly in order to ensure that its
  • Garmin GNC 420W | Pilots Guide - Page 7
    ANTI-REFLECTIVE COATING. It is very important to clean the screen using a clean, lint-free cloth and an eyeglass lens cleaner that is specified as safe for anti-reflective coatings. CAUTION: The Garmin GNC 420 does not contain any user-serviceable parts. Repairs should only be made by an authorized
  • Garmin GNC 420W | Pilots Guide - Page 8
    . To obtain warranty service, contact your local Garmin Authorized Service Center. For assistance in locating a Service Center near you, visit the Garmin Website at 'http://www.garmin.com' or contact Garmin Customer Service at 800-800-1020. vi GNC 420(A) Pilot's Guide and Reference 190-00140
  • Garmin GNC 420W | Pilots Guide - Page 9
    Rack • Connectors • GPS Antenna • Pilot's Guide • Quick Reference Guide • 400/500-series Display Interface Pilot's Guide Addendum • Database Subscription Packet • Warranty Registration Card • GNC 420 Simulator CD-ROM The Garmin dealer installs and configures the GNC 420. The GNC 420 is secured in
  • Garmin GNC 420W | Pilots Guide - Page 10
    / Volume 7 ENT (enter) 2 COM Flip-flop 8 Small left knob 3 CLR (clear) 9 Large left knob 4 Direct-to 10 NRST 5 RNG (map range) 11 OBS 6 MENU 12 MSG (message) 13 FPL (flight plan) 14 PROC (procedures) 15 Large right knob 16 Small right knob 1-2 GNC 420(A) Pilot's Guide and Reference 190
  • Garmin GNC 420W | Pilots Guide - Page 11
    letter or number and the large knob is used to move to the next character space. The small right knob is also used to move the target pointer up (turn clockwise) or down (counterclockwise) when the map panning function is active. ` 190-00140-20 Rev. K GNC 420(A) Pilot's Guide and Reference 1-3
  • Garmin GNC 420W | Pilots Guide - Page 12
    using the large and small right knobs (Figure 1-2). Experiment with them to become efficient at entering data. This will greatly reduce the amount of time spent operating the GNC 420 in flight. Figure 1-2 Blank Direct-to Page NOTE: When the GNC 420 using the 'Select OBS Course' Key - Used to When using a
  • Garmin GNC 420W | Pilots Guide - Page 13
    Service staff is available during normal business hours (U.S. Central time zone) at the phone and fax numbers listed on page ii. Garmin can also be reached by mail (page ii) or at our website address, www.garmin.com. Powering up the GNC 420 The GNC 420's power and COM volume are controlled using
  • Garmin GNC 420W | Pilots Guide - Page 14
    database is updated every 28 days and must be current for approved instrument approach operations. Information on database subscriptions is available inside the GNC 420 package. Figure 1-5 Database Versions Page Acknowledging the database flow may be manually entered if the installation does not
  • Garmin GNC 420W | Pilots Guide - Page 15
    Page or the Map Page. 4) Once instrument operation has been verified with the Instrument Panel Self-test Page displayed, press the ENT Key. NOTE: The GNC 420 can hold up to nine checklists with up to 30 entries in each checklist. 190-00140-20 Rev
  • Garmin GNC 420W | Pilots Guide - Page 16
    420 utilizes certain software algorithms to ensure reliable GPS receiver operation. Receiver Autonomous Integrity Monitoring (RAIM) and Fault Detection and Exclusion (FDE) are two examples. These features allow navigation during Oceanic/Remote legs of a flight using the GNC 420. For further details
  • Garmin GNC 420W | Pilots Guide - Page 17
    used for the first phase of the flight. The GNC 420's display (Figure 1-12) is divided into separate windows (or screen areas), including a COM Window, data field (distance), and the GPS standby communication frequency in the active field: Press the COM Flip-flop Key (Figure 1-13). Figure 1-12
  • Garmin GNC 420W | Pilots Guide - Page 18
    The Default NAV Page, the Map Page, and the NAV/ COM Page are used for most of the in-flight navigation. Current Page Group pages available when the GNC 420 installation includes connection to traffic and/or weather information sources. See Section 11 of this manual for more information. Selecting
  • Garmin GNC 420W | Pilots Guide - Page 19
    Direct-to Navigation The GNC 420 can use direct point-to-point navigation to provide guidance from takeoff to touchdown, even in the IFR environment. Once a , VOR, NDB, intersection, or user waypoint, as long as it is in the database or stored in memory as a user waypoint. 3) Turn the large right
  • Garmin GNC 420W | Pilots Guide - Page 20
    from' and 'to' waypoints), and six user-selectable data fields. The default settings for Map Page, and the NAV/COM Page are the primary pages used for navigation. Selecting the Default display a list of data options (Figure 1-20). User-selectable Data Fields Figure 1-18 Default NAV Page 1-12
  • Garmin GNC 420W | Pilots Guide - Page 21
    the GPS Window. 2) Turn the large right knob to select the desired frequency from the list. 3) Press the ENT Key to transfer the selected frequency to the standby field in the COM Window. COM airport and press the ENT Key. 190-00140-20 Rev. K GNC 420(A) Pilot's Guide and Reference 1-13
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    . In the flight plan or direct-to, the departure or arrival airport is replaced with the sequence of waypoints contained within the selected procedure. 1-14 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. K
  • Garmin GNC 420W | Pilots Guide - Page 23
    the five nearest center (ARTCC/FIR) and Flight Service Station (FSS) points of communication, plus alert the pilot to any nearby special-use or controlled airspaces. There are eight pages available Scrolling the Nearest Airport List 190-00140-20 Rev. K GNC 420(A) Pilot's Guide and Reference 1-15
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    turn the small right knob to display the desired information page. The Nearest Airport Page may be used in conjunction with the Direct-to Key to quickly set a course to a nearby facility in Key again to navigate to the nearby airport. 1-16 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. K
  • Garmin GNC 420W | Pilots Guide - Page 25
    in the flight path. Airspace information appears on this page based on the same criteria used for airspace alert messages: • If the projected course will take the aircraft inside an airspace ENT Key to view the airspace information. 190-00140-20 Rev. K GNC 420(A) Pilot's Guide and Reference 1-17
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    (The small knob is used to select the desired letter or number and the large knob is used to move to the next character space.) 6) Press the ENT Key once the identifier has been selected. The cursor moves to the next blank waypoint identifier field. 1-18 GNC 420(A) Pilot's Guide and Reference 190
  • Garmin GNC 420W | Pilots Guide - Page 27
    right knob to select 'Activate Flight Plan?' (Figure 1-35) and press the ENT Key. Figure 1-35 Flight Plan Catalog Page Menu 190-00140-20 Rev. K GNC 420(A) Pilot's Guide and Reference 1-19
  • Garmin GNC 420W | Pilots Guide - Page 28
    SECTION 1 INTRODUCTION Blank Page 1-20 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. K
  • Garmin GNC 420W | Pilots Guide - Page 29
    SECTION 2 COM SECTION 2: COM 2.1 Communicating Using the GNC 420 The GNC 420 features a digitally-tuned VHF COM radio that provides a seamless transition from communication to navigation, bringing the two most important functions in flying together in one panel-mounted unit. The GNC 420's COM radio
  • Garmin GNC 420W | Pilots Guide - Page 30
    Selecting a COM frequency: 1) Turn the large left knob to select the desired megahertz (MHz) value (Figure 2-3). For example, the '135' portion of the frequency '135.325'. Figure 2-4 Active Frequency of 135.325 Figure 2-3 Standby Frequency of 135.325 2-2 GNC 420(A) Pilot's Guide and Reference
  • Garmin GNC 420W | Pilots Guide - Page 31
    GNC 420's auto-tune feature allows the pilot to quickly select any database frequency in the GPS Window as the standby frequency. Any COM frequency displayed in the GPS Window can be transferred to the standby COM standby COM field. 190-00140-20 Rev. K GNC 420(A) Pilot's Guide and Reference 2-3
  • Garmin GNC 420W | Pilots Guide - Page 32
    Key to return to the NAV/COM Page with the frequencies for the selected airport. 5) Turn the large right knob to highlight the desired frequency. 6) Press the ENT Key to place the highlighted frequency in the standby COM Window field. 2-4 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev
  • Garmin GNC 420W | Pilots Guide - Page 33
    SECTION 2 COM Selecting a COM frequency for any airport in the database: 1) Turn the large right knob to select the WPT Page Group. 2) Turn the small right knob to select the Airport Frequencies Page (Figure 2-9). Emergency Channel The GNC 420's emergency channel select provides a quick method of
  • Garmin GNC 420W | Pilots Guide - Page 34
    is released; the COM transmitter automatically times out (ceases transmitting) after 35 seconds of continuous broadcasting. A 'COM push-totalk key stuck' message (Figure 2-11) is displayed as long as the condition continues. Figure 2-11 Message Page 2-6 GNC 420(A) Pilot's Guide and Reference 190
  • Garmin GNC 420W | Pilots Guide - Page 35
    by a highlighted square icon). The bottom right corner of the screen is also used to display the GNC 420's turn advisories ('Turn to 230°') and waypoint alerts ('Next DTK 230°') during the desired page (Figures 3-1 and 3-2). 190-00140-20 Rev. K GNC 420(A) Pilot's Guide and Reference 3-1
  • Garmin GNC 420W | Pilots Guide - Page 36
    (if configured) NAV/COM Position Satellite Status VNAV Figure 3-2 NAV Pages NOTE: The NAV Page Group may have eight or nine NAV pages available when the GNC 420 installation includes connection to traffic and/or weather information sources. See Section 11 of this manual for more information
  • Garmin GNC 420W | Pilots Guide - Page 37
    selected, the destination field remains blank. The symbols in Table 3-2 are used on the Default NAV Page (directly below the CDI), to depict the bottom of the Default NAV Page there are six user-definable fields which display the data needed as the flight GNC 420(A) Pilot's Guide and Reference 3-3
  • Garmin GNC 420W | Pilots Guide - Page 38
    Change Fields?' option is already highlighted, so press the ENT Key to select this option. 3) Use the large right knob to highlight the data field to be changed (Figure 3-5). Figure 3-6 Select page. Figure 3-5 'DIS' Field Highlighted 3-4 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. K
  • Garmin GNC 420W | Pilots Guide - Page 39
    plan to a second Garmin 400/500-series unit. See Section 9.2, Flight Planning: Crossfill for additional details on using the crossfill option. Map the GNC 420 is unable to determine a GPS position, the present position (airplane) symbol does not appear on the Map Page. Different symbols are used to
  • Garmin GNC 420W | Pilots Guide - Page 40
    range reading (Figure 3-9). The basemap has limited accuracy, and should not be used for navigation, but only for non-navigational situational awareness. Any basemap indication by the Map Display. Figure 3-9 Overzoom on Map Page 3-6 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. K
  • Garmin GNC 420W | Pilots Guide - Page 41
    right-hand side of the Map Page includes four user-selectable data fields (Figure 3-8). By default, the displayed described in Section 3.4. Figure 3-11 Panning on Map Page Selecting and using the panning function to pan the Map Display: 1) Press the small GNC 420(A) Pilot's Guide and Reference 3-7
  • Garmin GNC 420W | Pilots Guide - Page 42
    can be reviewed or the waypoint can be designated as the direct-to destination. Reviewing information for an on-screen airport, NAVAID, or user waypoint: 1) Use the panning function Press the CLR Key to exit the information page(s). 3-8 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. K
  • Garmin GNC 420W | Pilots Guide - Page 43
    onscreen special-use or controlled airspace: 1) Use the panning Figure 3-15 Map Panning Options Window 3) 'Review Airspace?' should already be highlighted. If not for the selected airspace. 4) To display the COM frequency(ies) for the controlling agency, turn GNC 420(A) Pilot's Guide and Reference 3-9
  • Garmin GNC 420W | Pilots Guide - Page 44
    the Map Page and additional features related specifically to the Map Page. Displaying the Map , and small classifications are used on the GNC 420 for airports and cities. Intersections, and Text Waypoint User Waypoints, Waypoint Text, Flight GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. K
  • Garmin GNC 420W | Pilots Guide - Page 45
    heading. Figure 3-18 Orientation Window 5) Press the ENT Key to accept the selected option (Figure 3-19). Figure 3-19 Map Setup Page 190-00140-20 Rev. K GNC 420(A) Pilot's Guide and Reference 3-11
  • Garmin GNC 420W | Pilots Guide - Page 46
    ENT Key to accept the selected option. Displaying airports, NAVAIDs, active flight plan waypoints, user-created waypoints, state/provincial boundaries, rivers/lakes, and cities: 1) From the Map Page to accept the selected option. 3-12 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. K
  • Garmin GNC 420W | Pilots Guide - Page 47
    to measure FROM and press the ENT Key (Figure 3-21). Figure 3-21 Using Pointer to Measure Distance and Bearing 4) Again, use the small and large right knobs to place the reference pointer at the desired . Figure 3-22 Full Screen Map 190-00140-20 Rev. K GNC 420(A) Pilot's Guide and Reference 3-13
  • Garmin GNC 420W | Pilots Guide - Page 48
    four user-selectable data fields to their original factory default settings. Restoring the factory default settings: From the Map Page Menu, turn the large right knob to highlight 'Restore Defaults?' (Figure 3-25) and press the ENT Key. Figure 3-25 Map Page Menu 3-14 GNC 420(A) Pilot's Guide and
  • Garmin GNC 420W | Pilots Guide - Page 49
    until the TERRAIN Page is displayed (Figure 3-26 and 3-27). The TERRAIN Page displays: • GPS-derived MSL altitude shown in increments of 20 feet or 10 meters, depending on unit configuration. The orientation available on this page. 190-00140-20 Rev. K GNC 420(A) Pilot's Guide and Reference 3-15
  • Garmin GNC 420W | Pilots Guide - Page 50
    and press the ENT Key. Pressing the CLR Key when the TERRAIN Page is displayed can also be used to toggle aviation information on or off. 3) Press the ENT Key. To switch back to a 120 Range Field Figure 3-29 TERRAIN Display Range 3-16 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. K
  • Garmin GNC 420W | Pilots Guide - Page 51
    Section 10.2 for a complete description of TERRAIN symbology. The following symbols (Figure 3-33) are used to represent obstacles and potential impact points on the Terrain Page. • Red Symbol - Terrain/Obstacle on the TERRAIN Page. 190-00140-20 Rev. K GNC 420(A) Pilot's Guide and Reference 3-17
  • Garmin GNC 420W | Pilots Guide - Page 52
    large right knob to place the cursor on the airport identifier field (top line on the NAV/COM Page, see Figure 3-34). 3) Turn the small right knob to select the desired airport Figure 3-34 NAV/COM Page Figure 3-35 Airport Window 3-18 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. K
  • Garmin GNC 420W | Pilots Guide - Page 53
    Figure 3-36 Scroll Bar 3) To place a frequency in the standby field of the COM Window, highlight the desired frequency and press the ENT Key. Some listed frequencies may Page 3) To return to the NAV/COM Page, press the ENT Key. 190-00140-20 Rev. K GNC 420(A) Pilot's Guide and Reference 3-19
  • Garmin GNC 420W | Pilots Guide - Page 54
    current area charts and NOTAMs. Changing the user-selectable data fields: 1) Press the MENU it provide the same information. Use the graphic 'track' indicator for the information contained in the database and generally take into account GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. K
  • Garmin GNC 420W | Pilots Guide - Page 55
    waypoint type, the pilot can designate any airport, NAVAID, or user waypoint as a reference waypoint. Press the small right knob, to highlight the waypoint identifier field (Figure 3-44), then use the small and large right knobs to enter the identifier GNC 420(A) Pilot's Guide and Reference 3-21
  • Garmin GNC 420W | Pilots Guide - Page 56
    reset all data fields to their original factory default settings. This returns the three user-selectable fields at the top of the page and the reference waypoint fields to default highlight 'Restore Defaults?' and press the ENT Key. 3-22 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. K
  • Garmin GNC 420W | Pilots Guide - Page 57
    GPS receiver status, and position accuracy. The Satellite Status Page (Figure 3-47) is helpful in troubleshooting weak (or missing) signal levels due to poor satellite coverage or installation problems (s) is ready for use. • Checkered signal strength GNC 420(A) Pilot's Guide and Reference 3-23
  • Garmin GNC 420W | Pilots Guide - Page 58
    collected (hollow signal strength bar, see Figure 3-48) before the satellite may be used for navigation (solid signal strength bar, see Figure 3-47). Once the GPS receiver has determined the current position, the GNC 420 indicates position, track, and ground speed on the other navigation pages. The
  • Garmin GNC 420W | Pilots Guide - Page 59
    The GNC 420's Vertical Navigation Page (the last NAV page, see Figure 3-49) allows the pilot to create a three-dimensional profile which guides the Map Page provide guidance to the pilot. 1 2 3 4 NOTE: To use the vertical navigation features, ground speed must be greater than 35 knots and the
  • Garmin GNC 420W | Pilots Guide - Page 60
    uses the altitude of a destination airport as stored in the Jeppesen NavData Card. 'MSL' lets the pilot set a specific target altitude for any waypoint category: airport, VOR, NDB, intersection, or user . 7) When using a flight plan ' field (Figure 3-54) and use the small and large right knobs to
  • Garmin GNC 420W | Pilots Guide - Page 61
    required (VSR) is displayed on the Vertical Navigation Page. Expect the following to occur when using the vertical navigation feature: • At one minute prior to reaching the initial descent point, a highlighted and press the ENT Key. 190-00140-20 Rev. K GNC 420(A) Pilot's Guide and Reference 3-27
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    SECTION 3 NAV PAGES Blank Page 3-28 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. K
  • Garmin GNC 420W | Pilots Guide - Page 63
    Field Highlighted When off course while navigating to a waypoint, the direct-to function may also be used to re-center the CDI (HSI) needle and proceed to the same waypoint. Re-centering the the Direct-to Key cancels the approach. 190-00140-20 Rev. K GNC 420(A) Pilot's Guide and Reference 4-1
  • Garmin GNC 420W | Pilots Guide - Page 64
    Region Facility Name 3) Use the small and large right knobs to enter the facility name or city location of the desired destination waypoint (Figure 4-5). When spelling the facility name or city, the GNC 420's Spell'N'Find feature selects the first entry in the database based upon the characters
  • Garmin GNC 420W | Pilots Guide - Page 65
    present position) in the NRST field. Nearby airports may also be selected as direct-to destinations using the steps described in Section 8.1. Selecting a nearby airport as a direct-to destination: 1) to activate the direct-to function. 190-00140-20 Rev. K GNC 420(A) Pilot's Guide and Reference 4-3
  • Garmin GNC 420W | Pilots Guide - Page 66
    are available when using the Direct-to Key, allowing the pilot to bypass the use of the small and as a direct-to destination: 1) If a single airport, NAVAID, or user waypoint is displayed on-screen: press the Direct-to Key, then press the GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. K
  • Garmin GNC 420W | Pilots Guide - Page 67
    desired destination location. 3) If the panning pointer is placed on an existing airport, NAVAID, or user waypoint, the waypoint name is highlighted (Figure 4-11). Press the Direct-to Key and the ENT 'MAP' waypoint and navigate to it. 190-00140-20 Rev. K GNC 420(A) Pilot's Guide and Reference 4-5
  • Garmin GNC 420W | Pilots Guide - Page 68
    begin navigation using the selected destination and course. 6) To re-select a direct course from present position (or select a new manually-defined course), simply press the Direct-to Key, followed by the ENT Key twice. Figure 4-13 CRS (Course) Field Highlighted 4-6 GNC 420(A) Pilot's Guide and
  • Garmin GNC 420W | Pilots Guide - Page 69
    Flight plans numbered from 1 through 19 are used to save flight plans for future use. 'Flight plan 00' is reserved exclusively for the flight plan currently in use for navigation. Any time the pilot activates ?' and press the ENT Key. 190-00140-20 Rev. K GNC 420(A) Pilot's Guide and Reference 5-1
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    is placed directly in front of this waypoint (Figure 5-5). Figure 5-5 Flight Plan Page 5) Use the small and large right knobs to enter the identifier of the new waypoint and press Page (Figure 5-7). Figure 5-7 Edited Flight Plan Page 5-2 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. K
  • Garmin GNC 420W | Pilots Guide - Page 71
    knob to return to the Flight Plan Catalog Page. A one-line user comment may be added to any flight plan, which is displayed on knob to select the comment line at the top of the screen. 4) Use the small and large right knobs to enter the new comment (Figure GNC 420(A) Pilot's Guide and Reference 5-3
  • Garmin GNC 420W | Pilots Guide - Page 72
    Flight Plans Once a flight plan is defined through the Flight Plan Catalog Page (using the steps outlined previously in this section), it may be activated for navigation. Activating Page Menu Figure 5-10 Flight Plan Catalog Page Menu 5-4 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. K
  • Garmin GNC 420W | Pilots Guide - Page 73
    is offered. To select a different location, turn the large right knob to select the flight plan number, use the small and large right knobs to enter a different number and press the ENT Key. 5) With 'Yes Key to delete the flight plan. 190-00140-20 Rev. K GNC 420(A) Pilot's Guide and Reference 5-5
  • Garmin GNC 420W | Pilots Guide - Page 74
    'Flight Plan' or 'User Waypoint' is selected, a second field appears to the immediate right of the 'Transfer' field. Use the small and large right knobs to enter the number of the flight plan or the name of the user waypoint to be transferred. 5-6 GNC 420(A) Pilot's Guide and Reference 190-00140
  • Garmin GNC 420W | Pilots Guide - Page 75
    described previously in this section. The copy function is useful for duplicating an existing flight plan before making changes. individual waypoints contained in the flight plan from the database or user waypoint memory. • 'Delete All Flight Plans?' - K GNC 420(A) Pilot's Guide and Reference 5-7
  • Garmin GNC 420W | Pilots Guide - Page 76
    Page provides information and editing functions for 'flight plan 00', the flight plan currently in use for navigation. Once the pilot has activated a direct-to or flight plan, the 5-20). Figure 5-20 Active Flight Plan Page Menu 5-8 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. K
  • Garmin GNC 420W | Pilots Guide - Page 77
    used for navigation guidance). Allows the pilot to transfer the active flight plan between two 400/500-series Garmin units in a dual unit installation contained in the flight plan from the database or user waypoint memory. Allows the pilot to select GNC 420(A) Pilot's Guide and Reference 5-9
  • Garmin GNC 420W | Pilots Guide - Page 78
    data fields for DTK and DIS are user-selectable and may be changed to display Defaults?' and press the ENT Key. Activating a flight plan along a specific leg: 1) Press the small right knob to activate the cursor and turn the cursor. 5-10 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. K
  • Garmin GNC 420W | Pilots Guide - Page 79
    Key. 'Load?' adds the approach to the flight plan without immediately using the approach for navigation guidance. This allows the pilot to continue 5) For precision approaches, a reminder window appears indicating that GPS guidance on such approaches is strictly for monitoring only. To confirm
  • Garmin GNC 420W | Pilots Guide - Page 80
    departure. Turn the small right knob to highlight the desired transition waypoint and press the ENT Key. 4) With 'Load?' highlighted, press the ENT Key. 5-12 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. K
  • Garmin GNC 420W | Pilots Guide - Page 81
    . Use the user waypoint at this location and add it to the flight plan, highlight 'Load?' and press the ENT Key. The name for the new user waypoint is derived from the identifier of the reference waypoint. Figure 5-31 Active Flight Plan Page Menu 190-00140-20 Rev. K GNC 420(A) Pilot's Guide
  • Garmin GNC 420W | Pilots Guide - Page 82
    save time when using the Active Flight Plan Page. These shortcuts speed the process of removing approaches, departures, and arrivals, and aid in selecting a specific flight plan leg press the ENT Key to remove the selected procedure. 5-14 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. K
  • Garmin GNC 420W | Pilots Guide - Page 83
    used not only to activate a specific point-to-point leg, but to also activate the procedure turn portion of an approach, follow a DME arc, or activate a holding pattern. Any approach, departure, or arrival can be reviewed the ENT Key. 190-00140-20 Rev. K GNC 420(A) Pilot's Guide and Reference 5-15
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    SECTION 5 FLIGHT PLANS Blank Page 5-16 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. K
  • Garmin GNC 420W | Pilots Guide - Page 85
    NavData Card, and are automatically updated when the new card is inserted into the GNC 420. Subscription information for NavData cards is included in the GNC 420 package. The Procedures Page (Figure Page Figure 6-3 Transitions Window 190-00140-20 Rev. K GNC 420(A) Pilot's Guide and Reference 6-1
  • Garmin GNC 420W | Pilots Guide - Page 86
    the ENT Key. Not all approaches in the database are approved for GPS use. When selecting an approach, a 'GPS' designation to the right of the procedure press the ENT Key. Figure 6-4 'GPS' Designations Figure 6-6 Confirmation Window 6-2 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. K
  • Garmin GNC 420W | Pilots Guide - Page 87
    the pilot fly an existing procedure (VOR, VOR/DME, NDB, RNAV, etc.) more accurately using GPS. Many overlay approaches are complex (in comparison to GPS-only approaches). The GNC 420 displays and guides the pilot through each leg of the approach, automatically sequencing through each of these legs
  • Garmin GNC 420W | Pilots Guide - Page 88
    '. DO NOT USE FOR NAVIGATION Figure 6-9 Sample Approach with Procedure Turn This example uses the VOR Runway 03 approach for Lynchburg (Virginia) Regional Airport, KLYH, and assumes a departure from Frederick (Maryland) Municipal Airport, KFDK. 6-4 GNC 420(A) Pilot's Guide and Reference 190
  • Garmin GNC 420W | Pilots Guide - Page 89
    departing KFDK, the destination (KLYH) is selected using the Direct-to Key or by creating a flight COM Page Figure 6-12 Approach and Transitions Windows 5) Press the PROC Key, select 'Activate Approach?' and press the ENT Key to activate the approach. 190-00140-20 Rev. K GNC 420(A) Pilot's Guide
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    at 1.0 nm 2) Several miles prior to reaching the IAF (LYH), the pilot may wish to review the approach sequence. Press the FPL Key to display the Active Flight Plan Page. Press the small 205° into the CDI (or HSI) using the OBS knob. 6-6 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. K
  • Garmin GNC 420W | Pilots Guide - Page 91
    the screen. Initiate the procedure turn at any time after receiving this alert message. DO NOT USE FOR NAVIGATION SECTION 6 PROCEDURES Refer to Figure 6-17 for the following steps: 6) Course guidance is course segment (FAF to MAP). 190-00140-20 Rev. K GNC 420(A) Pilot's Guide and Reference 6-7
  • Garmin GNC 420W | Pilots Guide - Page 92
    of the final course segment (FAF to MAP) until the pilot manually initiates the missed approach procedure (as mentioned previously in reference to the 'SUSP' advisory).     DO NOT USE FOR NAVIGATION Figure 6-21 Sequence to MAP 6-8 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. K
  • Garmin GNC 420W | Pilots Guide - Page 93
    . This additional waypoint is used as an aid in establishing the holding pattern, especially where the MAP and MAHP are the same waypoint. 2) Follow the missed approach procedures, as published on the approach plate, for proper climb and heading instructions. The GNC 420 provides guidance to the
  • Garmin GNC 420W | Pilots Guide - Page 94
    GPS 21' approach. (Figure 6-27, also Section 6.1 for additional instructions.) DO NOT USE FOR NAVIGATION Figure 6-25 Approach with Hold 1) Press the Direct-to Key. 2) Use Flight Plan Page appears (Figure 6-29). The pilot may review the approach sequence by pressing the small right knob and
  • Garmin GNC 420W | Pilots Guide - Page 95
    displays a timer during the holding pattern (Figure 6-32). The timer can be used to fly the one minute outbound portion of the holding pattern. (The holding pattern SUSP' is cancelled and the GNC 420 returns to automatic sequencing. 190-00140-20 Rev. K GNC 420(A) Pilot's Guide and Reference 6-11
  • Garmin GNC 420W | Pilots Guide - Page 96
    to manually USE FOR NAVIGATION Figure 6-33 Approach Mode Figure 6-34 Waypoint Alert 12) At 2.0 nm from the FAF (DEPOY intersection), the GNC 420 switches from terminal mode to approach mode. CDI scaling is tightened from 1.0 to 0.3 nm, full scale deflection. 6-12 GNC 420(A) Pilot's Guide
  • Garmin GNC 420W | Pilots Guide - Page 97
    . A 'from' indication is displayed on the CDI and Default NAV Page, but course guidance along the final approach course continues. If a missed approach is required, use the OBS Key to initiate the missed approach sequence, as outlined in this section. Figure 6-36 Missed Approach 190-00140-20 Rev
  • Garmin GNC 420W | Pilots Guide - Page 98
    USE FOR NAVIGATION Figure 6-37 Enroute Mode NOTE: As this manual using the steps outlined in Section 6.1. From the Transitions Window, select 'D258G' as the IAF. Also, select 'Load?' (or 'Activate?', if already cleared for the approach). Figure 6-39 Procedures Page 6-14 GNC 420(A) Pilot's Guide
  • Garmin GNC 420W | Pilots Guide - Page 99
    PROCEDURES Figure 6-40 Approach Window DO NOT USE FOR NAVIGATION    Figure 6-42 , KS) VOR or GPS Rwy 22 Figure 6-41 Terminal Mode Refer to Figure 6-41 for the following steps. 3) Within 30 nm of KTOP, the GNC 420 switches from enroute mode Rev. K GNC 420(A) Pilot's Guide and Reference 6-15
  • Garmin GNC 420W | Pilots Guide - Page 100
    approaching the FAF , 'NEXT DTK 214°' appears in the lower right corner of the screen (Figure 6-46). Select this course on the CDI (or HSI) using the OBS knob. Figure 6-46 Final Approach Fix 6-16 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. K
  • Garmin GNC 420W | Pilots Guide - Page 101
    course. Follow published missed approach procedures using the OBS Key to initiate the missed to select 'vectors to final' with the GNC 420. The first two options below normally require the • Load the full approach as described in Section 6.1. Use the Direct-to Key (by pressing it twice) from the
  • Garmin GNC 420W | Pilots Guide - Page 102
    PROC Key and select the 'VOR 22' approach using the steps outlined in Section 6.1. 3) From Municipal (KTOP) as the destination, using the Direct-to Key or as the select the 'VOR 22' approach using the steps outlined in Section approach course in magenta (magenta is used to depict the active leg of
  • Garmin GNC 420W | Pilots Guide - Page 103
    DO NOT USE FOR NAVIGATION     SECTION 6 PROCEDURES Figure 6-53 Heading of 025° 4) ATC instructs the pilot vectors-to-final). This allows the GNC 420 to provide guidance to the final approach course. 3) ATC instructs the pilot to turn left to a K GNC 420(A) Pilot's Guide and Reference 6-19
  • Garmin GNC 420W | Pilots Guide - Page 104
    the final approach course continues. Do not follow this extended course. Follow published missed approach procedures using the OBS Key to initiate the missed approach sequence, as outlined in this section. Figure 6-59 Final Approach 6-20 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. K
  • Garmin GNC 420W | Pilots Guide - Page 105
    database contain course from fix flight plan legs. The GNC 420 to altitude • Course from fix to manual sequence Course from fix to distance legs GPS Rwy 25        DO NOT USE FOR NAVIGATION Figure 6-61 KPMD Approach This example uses GNC 420(A) Pilot's Guide and Reference 6-21
  • Garmin GNC 420W | Pilots Guide - Page 106
    automatic sequencing of approach waypoints is suspended at the MAP. If a missed approach is required, use the OBS Key to initiate the missed approach sequence, as outlined below. Figure 6-63 Map Page sequences to the MAP (MA25). 6-22 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. K
  • Garmin GNC 420W | Pilots Guide - Page 107
    specific  Palmdale (CA) AF Plant 42 VOR/DME or GPS Rwy 25  Figure 6-64 Active Flight Plan Page MISSED ' direct PMD VOR and hold.  DO NOT USE FOR NAVIGATION Figure 6-65 Default NAV Page Figure 6- SUSP' re-appears above the OBS Key as the GNC 420 returns to suspend mode. This is normal when
  • Garmin GNC 420W | Pilots Guide - Page 108
    on each outbound and inbound portion of the holding pattern. 7) Note that the GNC 420 again displays 'SUSP' above the OBS Key. Automatic waypoint sequencing is suspended at the select another destination. Figure 6-68 Waypoint Alert 6-24 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. K
  • Garmin GNC 420W | Pilots Guide - Page 109
    GEDIC). Refer to Section 6.1 for instructions on selecting departures. Figure 6-70 now on the 'course from fix to manual sequence' leg. The distance displayed on the USE FOR NAVIGATION Figure 6-69 Coastal One Departure Figure 6-71 Default NAV Page 190-00140-20 Rev. K GNC 420(A) Pilot's Guide and
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    improve situational awareness throughout the approach. However, the pilot must always fly an approach as it appears on the approach plate. • The active leg (or the portion of the approach currently in use) is depicted in magenta on the Map Page. When flying the approach, the GNC 420 automatically
  • Garmin GNC 420W | Pilots Guide - Page 111
    numbers in the identifier, do not require the 'K' prefix. Many foreign countries use two letter prefixes. The WPT Page Group includes ten pages (Figure 7-1). While viewing name, or location (city). User Waypoint Figure 7-1 WPT Pages 190-00140-20 Rev. K GNC 420(A) Pilot's Guide and Reference 7-1
  • Garmin GNC 420W | Pilots Guide - Page 112
    ENT Key (Figures 7-3 and 7-4). Figure 7-3 Airport Location Page Figure 7-4 VOR Page 7) To remove the flashing cursor, press the small right knob. Figure 7-2 Airport Location Page 7-2 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. K
  • Garmin GNC 420W | Pilots Guide - Page 113
    , the GNC 420's Spell'N'Find feature scrolls through the database, displaying using the small and large right knobs, the GNC 420's Spell'N'Find feature selects the first entry (Figure 7-5) in the database right knob to scroll through any additional database listings (Figure 7-6) for the selected
  • Garmin GNC 420W | Pilots Guide - Page 114
    • Fuel - For public-use airports, the available fuel type GPS, VOR, RNAV ('RNV'), LORAN ('LOR'), NDB, TACAN ('TCN'), Helicopter ('HEL'), or VFR • Radar - Radar coverage: Yes or No • Airspace - Control environment: Class B, Class C, Class D, CTA, TMA, TRSA, or none 7-4 GNC 420(A) Pilot's Guide
  • Garmin GNC 420W | Pilots Guide - Page 115
    Runway Page. The map image range appears in the lower left corner and is adjustable using the RNG Key. For airports with multiple runways, information for each runway is available. Runway Page 6) To remove the flashing cursor, press the small right knob. GNC 420(A) Pilot's Guide and Reference 7-5
  • Garmin GNC 420W | Pilots Guide - Page 116
    Frequency Page (Figure 7-12). The Airport Frequency Page may be used to quickly select and tune a COM frequency. VLOC frequency is for reference only. Frequency Type Airport Identifier the small right knob to activate the cursor. 7-6 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. K
  • Garmin GNC 420W | Pilots Guide - Page 117
    Highlighted 3) Press the ENT Key to place the selected frequency in the standby field of the COM Window (Figure 7-14). Figure 7-15 'Info' Designation Highlighted 2) Press the ENT Key to Airport Frequency Page, press the ENT Key. 190-00140-20 Rev. K GNC 420(A) Pilot's Guide and Reference 7-7
  • Garmin GNC 420W | Pilots Guide - Page 118
    SECTION 7 WPT PAGES The following descriptions and abbreviations are used on the Airport Frequency Page: • Type - Usage type: Public, Heliport, Military, or Private the cursor on the approach (APR) procedure name field (Figure 7-17). 7-8 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. K
  • Garmin GNC 420W | Pilots Guide - Page 119
    the GPS receiver may be used for supplemental navigation guidance only. ILS approaches, for example, must be flown by tuning the external VLOC receiver to the proper frequency and following the CDI or HSI. Figure 7-19 Transitions Window 190-00140-20 Rev. K GNC 420(A) Pilot's Guide and Reference
  • Garmin GNC 420W | Pilots Guide - Page 120
    Loading an approach from the Airport Approach Page: 1) Select the desired approach and transition using the steps outlined in Section 6.1 (Figure 7-20). Figure 7-20 Airport Approach Page Key to display the Airport Approach Page Menu. 7-10 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. K
  • Garmin GNC 420W | Pilots Guide - Page 121
    knob to select the desired transition. Figure 7-24 Transitions Window 6) Press the ENT Key. The cursor moves to the runway field. 190-00140-20 Rev. K GNC 420(A) Pilot's Guide and Reference 7-11
  • Garmin GNC 420W | Pilots Guide - Page 122
    arrival procedure from the Airport Arrival Page: 1) Select the desired arrival, transition, and runway using the steps above. 2) Press the MENU Key to display the Airport Arrival Page Menu. 3) to return to the Airport Arrival Page. 7-12 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. K
  • Garmin GNC 420W | Pilots Guide - Page 123
    right knob to select the desired transition. 8) Press the ENT Key. To remove the flashing cursor, press the small right knob. 190-00140-20 Rev. K GNC 420(A) Pilot's Guide and Reference 7-13
  • Garmin GNC 420W | Pilots Guide - Page 124
    upon unit configuration) NOTE: The VOR displayed on the Intersection Page is the nearest VOR, not necessarily the VOR used to define the intersection. Intersections may only be selected by identifier, as described in Section 7.1. 7-14 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. K
  • Garmin GNC 420W | Pilots Guide - Page 125
    32 NDB Page Number of Pages in Current Page Group The following descriptions and abbreviations are used: • Symbol - See Section 3.4 for a graphic illustration of available NDB symbols • receiver to the selected VOR's frequency. 190-00140-20 Rev. K GNC 420(A) Pilot's Guide and Reference 7-15
  • Garmin GNC 420W | Pilots Guide - Page 126
    /minutes or degrees/minutes/seconds), MGRS, or UTM/UPS User waypoints may only be selected by name (identifier), as described in Section 7.1. Figure 7-35 User Waypoint Name Field Selected Figure 7-36 Waypoint Name Field Highlighted 7-16 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. K
  • Garmin GNC 420W | Pilots Guide - Page 127
    . K Figure 7-38 Radial Field Highlighted 6) The cursor moves to the distance (DIS) field. Use the small and large right knobs to enter the distance from the reference waypoint to the new user waypoint. Press the ENT Key to accept the selected distance. GNC 420(A) Pilot's Guide and Reference 7-17
  • Garmin GNC 420W | Pilots Guide - Page 128
    The GNC 420 can store user-defined waypoints which are generated from other equipment in the panel. For example, an EFIS equipped with joystick inputs can be used to create user waypoints which (if the installation supports this) automatically transfer to the GNC 420. 7-18 GNC 420(A) Pilot's Guide
  • Garmin GNC 420W | Pilots Guide - Page 129
    information. Modifying a user waypoint by changing its latitude/longitude position: 1) With the User Waypoint Page displayed, press the small right knob to activate the cursor. 2) Use the small and knob to remove the flashing cursor. 190-00140-20 Rev. K GNC 420(A) Pilot's Guide and Reference 7-19
  • Garmin GNC 420W | Pilots Guide - Page 130
    the distance (DIS) field (Figure 7-45). Use the small and large right knobs to change the distance from the reference waypoint to the new user waypoint, if desired. Press the ENT Key plan before modifying or deleting the waypoint(s). 7-20 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. K
  • Garmin GNC 420W | Pilots Guide - Page 131
    the ENT Key. Figure 7-48 User Waypoint Page Menu 'Crossfill?' allows the pilot to transfer a user waypoint to another 400/500-series unit (if installed). Please refer to Sections 5.1 and 10.1 for detailed information on crossfill. 190-00140-20 Rev. K GNC 420(A) Pilot's Guide and Reference 7-21
  • Garmin GNC 420W | Pilots Guide - Page 132
    the ENT Key. Figure 7-50 User Waypoint Name Selected 4) A 'rename waypoint' confirmation window is displayed (Figure 7-51). With 'Yes?' highlighted, press the ENT Key to rename the selected user waypoint. Figure 7-51 Rename Waypoint Window 7-22 GNC 420(A) Pilot's Guide and Reference 190-00140-20
  • Garmin GNC 420W | Pilots Guide - Page 133
    highlighted, press the ENT Key. 4) A 'delete all waypoints' confirmation window is displayed (Figure 7-54). With 'Yes?' highlighted, press the ENT Key to delete all user waypoints from memory. Figure 7-54 Delete All Waypoints Window 190-00140-20 Rev. K GNC 420(A) Pilot's Guide and Reference 7-23
  • Garmin GNC 420W | Pilots Guide - Page 134
    SECTION 7 WPT PAGES Blank Page 7-24 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. K
  • Garmin GNC 420W | Pilots Guide - Page 135
    the five nearest Flight Service Station (FSS) and center (ARTCC/FIR) points of communication, plus alerts the pilot to any Special Use (SUA) or Controlled VOR NRST User NRST Center NRST Flight Service NRST Airspace Figure 8-1 NRST Pages 190-00140-20 Rev. K GNC 420(A) Pilot's Guide and Reference
  • Garmin GNC 420W | Pilots Guide - Page 136
    , VORs, NDBs, intersections, user waypoints, or SUAs: 1) Select the desired NRST page, using the steps outlined on the nearest flight service station or center points of communication: 1) Select the desired NRST page, using the steps GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. K
  • Garmin GNC 420W | Pilots Guide - Page 137
    be used in conjunction with the GNC 420's direct-to function to quickly set a course to a nearby facility, and can provide navigation to the nearest airport in case of an in-flight emergency. Selecting a nearby airport, VOR, NDB, intersection, or user waypoint as a directto destination: 1) Use the
  • Garmin GNC 420W | Pilots Guide - Page 138
    on the list. The pilot may wish to use this feature to exclude seaplane bases or runway COM Frequency Highlighted 4) Press the ENT Key to place the selected frequency in the standby field of the COM Window (Figure 8-10). Figure 8-10 Frequency Moved to Standby Field 8-4 GNC 420(A) Pilot's Guide
  • Garmin GNC 420W | Pilots Guide - Page 139
    5) Press the COM Flip-flop Key to activate the Viewing additional information for a nearby airport: 1) Select the Nearest Airport Page, using the steps outlined in Section 8.1. 2) Press the small right knob to activate Highlighted 190-00140-20 Rev. K GNC 420(A) Pilot's Guide and Reference 8-5
  • Garmin GNC 420W | Pilots Guide - Page 140
    Intersection Page Position of Current Page within Current Page Group Current Page Group Number of Pages in Current Page Group Figure 8-16 Nearest NDB Page 8-6 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. K
  • Garmin GNC 420W | Pilots Guide - Page 141
    VOR Page Viewing additional information for a nearby VOR: 1) Select the nearest VOR Page, using the steps outlined in Section 8.1. 2) Press the small right knob to activate the cursor Group Figure 8-19 Nearest User Waypoint Page 190-00140-20 Rev. K GNC 420(A) Pilot's Guide and Reference 8-7
  • Garmin GNC 420W | Pilots Guide - Page 142
    Select the Nearest Center Page, using the steps outlined in Section COM Window (Figure 8-22). Figure 8-22 Frequency Moved to Standby Field 6) Press the COM Flip-flop Key to activate the selected frequency. 7) Press the small right knob to remove the flashing cursor. 8-8 GNC 420(A) Pilot's Guide
  • Garmin GNC 420W | Pilots Guide - Page 143
    FSS's frequency from the Nearest Flight Service Station Page: 1) Select the Nearest Flight Service Station Page, using the steps outlined in Section 8.1 ( COM frequency[ies] or VOR frequency for duplex operation). Figure 8-25 Frequency Field Highlighted 190-00140-20 Rev. K GNC 420(A) Pilot's Guide
  • Garmin GNC 420W | Pilots Guide - Page 144
    alerts the pilot to as many as nine controlled or special use airspaces near or in the flight path. Alerts are provided Airspace Page shows the airspace as 'Ahead'. 6) Press the COM Flip-flop Key to activate the selected frequency. 7) Press GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. K
  • Garmin GNC 420W | Pilots Guide - Page 145
    page. Once an airspace alert message appears, detailed information concerning the specific airspace is provided on the Nearest Airspace Page (Figure 8-29). The on the Nearest Airspace Page: 1) Select the Nearest Airspace Page, using the steps outlined in Section 8.1 (Figure 8-30). Figure 8-30
  • Garmin GNC 420W | Pilots Guide - Page 146
    Page (Figure 8-32) for the desired controlled or special use airspace. 2) Turn the large right knob to highlight 'Frequencies COM Window. 5) Press the COM Flip-flop Key to activate the selected frequency (Figure 8-34). Figure 8-34 Frequency Moved to Active Field 8-12 GNC 420(A) Pilot's Guide
  • Garmin GNC 420W | Pilots Guide - Page 147
    details). Figure 8-35 Airspace Page for Class C Airspace Figure 8-36 Airspace Page for MOA Figure 8-37 Airspace Page for Prohibited Area 190-00140-20 Rev. K GNC 420(A) Pilot's Guide and Reference 8-13
  • Garmin GNC 420W | Pilots Guide - Page 148
    SECTION 8 NRST PAGES Blank Page 8-14 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. K
  • Garmin GNC 420W | Pilots Guide - Page 149
    AUX PAGES 9.1 AUX Page Group Section 3.1 introduced the GNC 420's main page groups (Table 9-1)-NAV, WPT, AUX, have five AUX pages available when the GNC 420 installation includes connection to a weather information source. See Section 11 of this manual for more information. Figure 9-3 Flight
  • Garmin GNC 420W | Pilots Guide - Page 150
    calculations, and a 'Crossfill' function to transfer flight plans/user waypoints to a second GNC 420. When a menu option is selected, the corresponding page appears flashing cursor (Figure 9-4). Figure 9-6 Density Alt/TAS/Winds Page 9-2 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. K
  • Garmin GNC 420W | Pilots Guide - Page 151
    time the GNC 420 is powered on, until the message is deleted. Periodic messages automatically reset to the original timer value, once the message is displayed. Event-based messages do not use a timer, but rather a specific date and time. 190-00140-20 Rev. K GNC 420(A) Pilot's Guide and Reference
  • Garmin GNC 420W | Pilots Guide - Page 152
    is only available on GNC 420 installations which include a Shadin fuel computer. In these installations, use the 'Change Fields?' option to review separate fuel information for left and right engines. Figure 9-10 Fuel Planning Page Flight Plan 9-4 GNC 420(A) Pilot's Guide and Reference 190-00140
  • Garmin GNC 420W | Pilots Guide - Page 153
    . Press the ENT Key when finished. 7) The flashing cursor moves to the fuel flow (FF) field. Use the small and large right knobs to enter the fuel flow rate. Press the ENT Key when finished. Note . Figure 9-13 Select Field Type Window 190-00140-20 Rev. K GNC 420(A) Pilot's Guide and Reference 9-5
  • Garmin GNC 420W | Pilots Guide - Page 154
    In this instance fuel flow is manually entered and is used to calculate fuel on board. When fuel flow or fuel on board is manually entered, the figures are retained the next time the page is displayed (with fuel on board continuously recalculated). • Fuel flow sensor installed, but no fuel on board
  • Garmin GNC 420W | Pilots Guide - Page 155
    ) field. 6) Use the small and moves to the ground speed (GS) field. Use the small and large right knobs to enter Page (Figure 9-17), using the steps described at the altitude (IND ALT) field. Use the small and large right knobs (CAS) field (Figure 9-18). Use the small and large right knobs to
  • Garmin GNC 420W | Pilots Guide - Page 156
    flashing cursor moves to the aircraft heading (HDG) field. Use the small and large right knobs to enter the aircraft of head wind or tail wind component NOTE: If the installation includes components (such as an airdata sensor) to provide any GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. K
  • Garmin GNC 420W | Pilots Guide - Page 157
    database cycle number. 3) The flashing cursor highlights the transfer data option (TRANSFER) field (Figure 9-24). Turn the small right knob to display a window of available data options (Figure 9-25). Figure 9-24 Transfer Field Highlighted 190-00140-20 Rev. K Figure 9-25 Transfer Window GNC 420
  • Garmin GNC 420W | Pilots Guide - Page 158
    a second 400/500-series Garmin unit in a dual unit installation. This option is the default Use the small and large right knobs to enter the message text. Press the ENT Key when finished. (The GNC 420 stores up to nine scheduled messages holding 20 characters each.) 9-10 GNC 420(A) Pilot's Guide
  • Garmin GNC 420W | Pilots Guide - Page 159
    expire at a specific date and time. Press the ENT Key when finished. SECTION 9 AUX PAGES Editing a scheduled message: 1) Select 'Scheduler' from the Flight Planning Page, using the steps described at ENT Key to confirm the deletion. 190-00140-20 Rev. K GNC 420(A) Pilot's Guide and Reference 9-11
  • Garmin GNC 420W | Pilots Guide - Page 160
    and features. NOTE: Scroll down to view the last 3 items (Software Versions, Database Versions, and Terrain Database Versions) listed on the Utility Page. Menu Options (to Select, MENU Key to display the Trip Statistics Page Menu. 9-12 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. K
  • Garmin GNC 420W | Pilots Guide - Page 161
    condition, all GPS navigation data on the GNC 420 is disabled. Use an alternate navigation source. • Sunrise/Sunset - Allows the pilot to calculate the time of sunrise and sunset at any waypoint or the present position for a specified date. • Software Versions - Provides software version information
  • Garmin GNC 420W | Pilots Guide - Page 162
    checklist and press the ENT Key. 2) Press the MENU Key to display an options menu. Select 'Edit Item?' and press the ENT Key, then use the small and large right knobs to edit each checklist item. Press the ENT Key when finished. 9-14 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. K
  • Garmin GNC 420W | Pilots Guide - Page 163
    ENT Key. Utility Page: Flight Timers Viewing, using, or resetting the generic timer: 1) Select 'Flight Timers' from the Utility Page (Figure 9-36), using the steps described at the beginning of this section Figure 9-37 Count Window 190-00140-20 Rev. K GNC 420(A) Pilot's Guide and Reference 9-15
  • Garmin GNC 420W | Pilots Guide - Page 164
    using GPS-computed ground speed exceeds 30 knots. 4) Press the ENT Key when finished. 5) To reset the total trip time, turn the large right knob to highlight 'Reset?' (Figure 9-39) and press the ENT Key. Figure 9-38 Reset Mode Window Figure 9-39 'Reset?' Highlighted 9-16 GNC 420(A) Pilot's Guide
  • Garmin GNC 420W | Pilots Guide - Page 165
    9-42 RAIM Prediction Highlighted 2) The flashing cursor highlights the waypoint field (Figure 9-43). Use the small and large right knobs to enter the identifier of the waypoint at which the pilot reset option and press the ENT Key. 190-00140-20 Rev. K GNC 420(A) Pilot's Guide and Reference 9-17
  • Garmin GNC 420W | Pilots Guide - Page 166
    flashing cursor moves to the arrival time field. Use the small and large right knobs to enter the specific information regarding RAIM protection limits, also refer to Section 12 for FDE (Fault Detection and Exclusion) information. Figure 9-46 Date Field Highlighted 9-18 GNC 420(A) Pilot's Guide
  • Garmin GNC 420W | Pilots Guide - Page 167
    and area of coverage of each terrain and obstacle database. This page is for information purposes only-no user functions are available from this page. Figure 9-48 Software Versions Page Figure 9-50 Terrain Database Versions Page 190-00140-20 Rev. K GNC 420(A) Pilot's Guide and Reference 9-19
  • Garmin GNC 420W | Pilots Guide - Page 168
    options are available: • 'Airspace Alarms' - Allows the pilot to turn the controlled/special-use airspace message alerts on or off. This does not affect the alerts listed on the Nearest 5 nm beyond 30 nm (from the departure airport). 9-20 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. K
  • Garmin GNC 420W | Pilots Guide - Page 169
    . For example, if 1.0 nm is selected, the GNC 420 uses this for the enroute and terminal phase and ramp down GPS receiver. The 'True' setting references all information to true north, and the 'User' setting corrects information to an user-entered value. 190-00140-20 Rev. K GNC 420(A) Pilot's Guide
  • Garmin GNC 420W | Pilots Guide - Page 170
    using the paper charts for reference only, the GNC 420 still provides correct navigation guidance to the waypoints contained in the database calculated directly from the GPS satellites' signals and cannot be changed. To use local time, simply GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. K
  • Garmin GNC 420W | Pilots Guide - Page 171
    9-59 Selected CDI Field Highlighted 3) Press the ENT Key to accept the selected scale. The 'System CDI' field displays the CDI scale currently in use. The 'System CDI' setting may differ from the 'Selected CDI' depending upon the current phase of flight. GNC 420(A) Pilot's Guide and Reference 9-23
  • Garmin GNC 420W | Pilots Guide - Page 172
    '). To enter an arrival alarm distance, use the small and large right knobs to enter user value field (to the immediate right of 'User'). Use the small and large right knobs to enter the desired magnetic variation direction and value. Press the ENT Key when finished. 9-24 GNC 420(A) Pilot's Guide
  • Garmin GNC 420W | Pilots Guide - Page 173
    position format: 1) Select 'Position Format/Map Datum' from the Setup 1 Page (Figure 9-64), using the steps described at the beginning of this section. Figure 9-63 Units Mag/Var Page The ENT Key to accept the selected format. 190-00140-20 Rev. K GNC 420(A) Pilot's Guide and Reference 9-25
  • Garmin GNC 420W | Pilots Guide - Page 174
    or plus (+) sign to indicate whether the offset is behind UTC or ahead of UTC. In the United States, all local time offsets use minus, or behind UTC. 4) Press the ENT Key to accept the selected offset. Figure 9-67 Time Format Window 9-26 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. K
  • Garmin GNC 420W | Pilots Guide - Page 175
    : 1) Select the desired menu option from the Setup 1 Page, using the steps described at the beginning of this section. 2) Press the parameters which define the nearest airport search, and COM transceiver channel spacing. When a menu option is Rev. K GNC 420(A) Pilot's Guide and Reference 9-27
  • Garmin GNC 420W | Pilots Guide - Page 176
    manual control of the display contrast and backlighting of the GNC 420's display. • 'Nearest Airport Criteria' - Defines the minimum runway length and surface type used runway surface type. • 'COM Configuration' - Allows the pilot to select 8.33 kHz or 25.0 kHz COM frequency channel spacing. NOTE:
  • Garmin GNC 420W | Pilots Guide - Page 177
    Display' from the Setup 2 Page, using the steps described at the beginning the desired mode: Auto or Manual (Figure 9-74). Press the or Manual. Press the ENT Key to accept the selection. 4) If 'Manual' is Figure 9-74 Backlight Mode Window 3) If 'Manual' is selected, the flashing cursor moves to
  • Garmin GNC 420W | Pilots Guide - Page 178
    Airport Criteria' from the Setup 2 Page, using the steps described at the beginning of this COM Configuration Setting the COM channel spacing: 1) Select 'COM Configuration' from the Setup 2 Page, using 77). To enter a different minimum runway length, use the small and large right knobs to enter the
  • Garmin GNC 420W | Pilots Guide - Page 179
    Fields: 1) Select 'Data Field Configuration' from the Setup 2 Page, using the steps described at the beginning of this section. The flashing cursor highlights Field: 1) Select 'Data Field Configuration' from the Setup 2 Page, using the steps described at the beginning of this section. Turn the large
  • Garmin GNC 420W | Pilots Guide - Page 180
    field to display user selectable data option from the Setup 2 Page, using the steps described at the beginning of (Figure 9-84). Figure 9-84 COM Setup Page Menu 3) With 'Restore GNC 420 is configured for interface with a traffic information device (see Section 11). 9-32 GNC 420(A) Pilot's Guide
  • Garmin GNC 420W | Pilots Guide - Page 181
    with or configured for TERRAIN. See the 400-series Installation Manual (190-00140-02) for TERRAIN configuration information. 10.1 Introduction Garmin TERRAIN is a non-TSO-C151b-certified terrain awareness system incorporated into GNC 420 units to increase situational awareness and aid in reducing
  • Garmin GNC 420W | Pilots Guide - Page 182
    by frequently updating the altimeter Using TERRAIN During power-up, the terrain/obstacle database versions are displayed along with a disclaimer to the pilot. At the same time, TERRAIN self-test begins. A test failure is annunciated for TERRAIN as shown in Table 10-4. 10-2 GNC 420(A) Pilot's Guide
  • Garmin GNC 420W | Pilots Guide - Page 183
    associated with an alert severity level. Terrain graphics and visual annunciations also use these color assignments. 100 ft Threshold Projected Flight Path Unlighted Obstacle Potential Alert Level WARNING (Red) CAUTION (Yellow) 190-00140-20 Rev. K GNC 420(A) Pilot's Guide and Reference 10-3
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    Alerts are issued when flight conditions meet parameters that are set within TERRAIN software algorithms. TERRAIN alerts typically employ either an ADVISORY or a CAUTION alert severity Figure 10-4 TERRAIN Caution Pop-up (Flashing) 10-4 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. K
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    (IOI) Advisory (FLASHING) (FLASHING) Imminent Obstacle Impact (IOI) Caution (FLASHING) Premature Descent Alert (PDA) Advisory Table 10-2 TERRAIN Alert Summary (FLASHING) 190-00140-20 Rev. K GNC 420(A) Pilot's Guide and Reference 10-5
  • Garmin GNC 420W | Pilots Guide - Page 186
    GPS signal System Test in progress None System Test pass None None Table 10-3 Additional System Annunciations Forward Looking Terrain Avoidance The Forward Looking Terrain Avoidance (FLTA) alert is used Values for FLTA Alerts 10-6 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. K
  • Garmin GNC 420W | Pilots Guide - Page 187
    also has an inhibit mode that deactivates the FLTA/PDA visual alerts. Pilots should use discretion when inhibiting TERRAIN and always remember to enable the system when appropriate. Inhibiting again. Height Above Terrain (Feet) 190-00140-20 Rev. K GNC 420(A) Pilot's Guide and Reference 10-7
  • Garmin GNC 420W | Pilots Guide - Page 188
    GPS status. If the terrain/obstacle database is not available, 'TER FAIL' is generated in the annunciation window, and 'TERRAIN has failed' is generated on the TERRAIN Page (Figure 10-9). Figure 10-8: TERRAIN NOT AVAILABLE Display Figure 10-9: TERRAIN FAILED Display 10-8 GNC 420(A) Pilot's Guide
  • Garmin GNC 420W | Pilots Guide - Page 189
    ' and higher are included in the Obstacle Database. It is very important to note that not all obstacles are necessarily charted and therefore may not be contained in the Obstacle Database. Figure 10-11 Terrain Database Versions Page 190-00140-20 Rev. K GNC 420(A) Pilot's Guide and Reference 10-9
  • Garmin GNC 420W | Pilots Guide - Page 190
    the front of this document. Updating terrain/obstacle databases: 1) Acquire a new terrain data card from Garmin. 2) Turn off the power to the GNC 420. 3) Remove the old terrain data card from and insert the new card into the right-most slot of the GNC 420. 4) Turn on the GNC 420 and verify that the
  • Garmin GNC 420W | Pilots Guide - Page 191
    avoid' other aircraft. TIS should not be used for avoidance maneuvers during Instrument Meteorological Conditions (IMC installation manual). 11.1 Traffic Information Service (TIS) This section is written for: • Garmin GNC 420 Main System Software Version 5.01 and later • GTX 330/330D Main Software
  • Garmin GNC 420W | Pilots Guide - Page 192
    TIS Limitations is not comprehensive. Garmin recommends the user review the TIS Limitations section of the Aeronautical Information Manual, Section 1-3-5. 7.0 nm intruder to be a threat. The user should not start evasive maneuvers using information from the GNC 420 display or on a traffic advisory
  • Garmin GNC 420W | Pilots Guide - Page 193
    , and software in use Since TIS performance is monitored by maintenance personnel rather than ATC, it is suggested that malfunctions be reported in the following ways: • By telephone to the nearest Flight Service Station (FSS) facility. • By FAA Form 8000-7, Safety Improvement Report, a postage
  • Garmin GNC 420W | Pilots Guide - Page 194
    female voice) is configured during installation. The following TIS audio alerts are available: • "Traffic" - TIS traffic alert is received. • "Traffic Not Available" - TIS service is not available or out of range. TIS Symbology TIS traffic is displayed on the GNC 420 unit according to TCAS symbology
  • Garmin GNC 420W | Pilots Guide - Page 195
    , the traffic is removed from the display. Traffic Coasting Banner and Age Indicator Figure 11-6 Traffic Age Indicator and Coasting Banner 190-00140-20 Rev. K GNC 420(A) Pilot's Guide and Reference 11-5
  • Garmin GNC 420W | Pilots Guide - Page 196
    pilot should be aware that this status may be a normal mode of operation in a dual transponder installation where the GTX 330 with TIS is not the selected transponder. Figure 11-10 'Standby' Message • may be present but not shown. 11-6 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. K
  • Garmin GNC 420W | Pilots Guide - Page 197
    displayed (Figure 11-13). The Traffic Warning Window shows a small thumbnail map which can take the user to the Traffic Page by pressing the ENT Key, or go back to the previous page by pressing at a rate greater than 500 fpm. 190-00140-20 Rev. K GNC 420(A) Pilot's Guide and Reference 11-7
  • Garmin GNC 420W | Pilots Guide - Page 198
    Key. Figure 11-15 Map Page Displaying Traffic The Traffic Mode Selection Menu (Figure 11-16) allows the user to choose from the following options: TRAFC Mode: • All trfc - All traffic is displayed on the Key to return the Map Page. 11-8 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. K
  • Garmin GNC 420W | Pilots Guide - Page 199
    be changed (Figure 11-18). Figure 11-18 Thumbnail Traffic on Map Page Highlighting TIS Traffic Using Map Page Panning Another Map Page feature is panning, which allows the pilot to move the -19 Traffic Range and Altitude Separation 190-00140-20 Rev. K GNC 420(A) Pilot's Guide and Reference 11-9
  • Garmin GNC 420W | Pilots Guide - Page 200
    at the time of installation) the system switches from operating mode to standby mode. The GNC 420 unit displays 'STBY'. As described previously, both the standby and operating modes can be manually overridden by the display controls. 11-10 GNC 420(A) Pilot's Guide and Reference 190-00140
  • Garmin GNC 420W | Pilots Guide - Page 201
    Garmin GNC 420/GTS 8XX interface, refer to the 400/500 Series Display Interfaces Pilot's Guide Addendum (190-00140-10) when interfacing with non-Garmin products WARNING: The GTS 8XX interface is intended for advisory use 8XX unit is installed. System Description The GNC 420 provides an optional
  • Garmin GNC 420W | Pilots Guide - Page 202
    TA threats. Traffic Symbology Traffic information from the GTS 8XX is displayed on the GNC 420 unit using TAS/TCAS symbology (Table 11-4) on a dedicated Traffic page, and on the 11-5 TA Sensitivity Level and TA Alerting Criteria 11-12 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. K
  • Garmin GNC 420W | Pilots Guide - Page 203
    8XX. The self-test can also be initiated by the user during normal operation. Check for the following test criteria on screen), the GTS 8XX is inoperable, see the GTS 8XX Installation Manual for detailed information on Failure Response. NOTE: The FAILED GNC 420(A) Pilot's Guide and Reference 11-13
  • Garmin GNC 420W | Pilots Guide - Page 204
    (Figure 11-23). The orientation source shown at the top of the display first uses heading ('HDG'), then GPS Track ('TRK') if no heading is available, to orient the display. If the GTS 820/850 only) • 24 and 40 nm (GTS 820/850 only) 11-14 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. K
  • Garmin GNC 420W | Pilots Guide - Page 205
    SECTION 11 ADDITIONAL FEATURES Note: Confirmation is not required, the mode is changed immediately when using the small right knob. Altitude Display Mode Figure 11-25 "UNR" Selected 3) Press Altitude Display Modes 0 ft -2,700 ft 190-00140-20 Rev. K GNC 420(A) Pilot's Guide and Reference 11-15
  • Garmin GNC 420W | Pilots Guide - Page 206
    option. 8) Turn the small right knob to select the desired option. 9) Press the ENT Key. Repeat steps 7-9 for Traffic Symbol and Traffic Label. 11-16 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. K
  • Garmin GNC 420W | Pilots Guide - Page 207
    Note: The thumbnail range defaults to 6 nm and cannot be changed. Highlighting Traffic Data Using Map Panning Another map page function is panning, which allows changing the map beyond its : Proximity Advisory • TRFC: Other Traffic 190-00140-20 Rev. K GNC 420(A) Pilot's Guide and Reference 11-17
  • Garmin GNC 420W | Pilots Guide - Page 208
    software versions. NOTE: This section is written exclusively for GNC 420 units that are configured with the GDL 49 or GDL 69(A) Data Link Satellite Receiver. Refer to the 400/500 Series Display Interfaces Pilot's Guide Addendum (190-00140-10) when interfacing with non-Garmin messaging services using
  • Garmin GNC 420W | Pilots Guide - Page 209
    a Doppler radar system that has greatly improved the detection of meteorological events such as used for short-range avoidance of weather. Certain limitations exist regarding the NEXRAD radar displays. Some, but not all, are listed for the user . K GNC 420(A) Pilot's Guide and Reference 11-19
  • Garmin GNC 420W | Pilots Guide - Page 210
    returned signal strength increases. Precipitation intensity is displayed on the GNC 420 units using colors represented by the dBZ values listed in Table 11-6. √ √ Large Large NOTE: The information presented in this Pilot's Guide regarding NEXRAD is not meant to be comprehensive. The NOAA website
  • Garmin GNC 420W | Pilots Guide - Page 211
    'Position'). The 'WPT' field is used to enter a waypoint identifier as the reference point for the request. ♦ From Lat/Lon - Request NEXRAD data from a specific latitude and longitude. This is only selectable the active flight plan. 190-00140-20 Rev. K GNC 420(A) Pilot's Guide and Reference 11-21
  • Garmin GNC 420W | Pilots Guide - Page 212
    updates. This setting provides best performance for the GDL 49. • The 'Manual Send?'(GDL 49) or 'Update Request?' (GDL 69) field is used to request NEXRAD Data. 4) Use also use the map panning function to request NEXRAD data at a specific GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. K
  • Garmin GNC 420W | Pilots Guide - Page 213
    Weather Page: 1) Select the NAV Weather Page (Figure 11-34) using the small and large right knobs. When the GNC 420 unit is configured with the Data Link interface, the Weather Page is the Page paragraph following in this section. 190-00140-20 Rev. K GNC 420(A) Pilot's Guide and Reference 11-23
  • Garmin GNC 420W | Pilots Guide - Page 214
    (solid area fill) Yellow Figure 11-35 Map Setup Window Highlight the NEXRAD Symbol field, and use the small right knob to set the desired map range at which to overlay NEXRAD data. The range the NEXRAD graphics in the 'Low' mode. GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. K
  • Garmin GNC 420W | Pilots Guide - Page 215
    NEXRAD, METAR, or Textual METAR Page for a specific airport from the Airport Location Page. Three methods of selecting the Airport Location Page: • Use the small and large right knobs to select the is available for that airport. 190-00140-20 Rev. K GNC 420(A) Pilot's Guide and Reference 11-25
  • Garmin GNC 420W | Pilots Guide - Page 216
    the aircraft by sending the aircraft's position manually or automatically to the EchoFlight website (www.EchoFlight. com) for use by third-party EchoFlight customers. Sending the current position expressed in Latitude and Longitude 11-26 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. K
  • Garmin GNC 420W | Pilots Guide - Page 217
    's Automatic Weather Delivery (AWD) service, the time interval must be set Figure 11-42). • Manual Send? - This field is used to send out a current used to select between requesting the raw METAR text (Textual) or requesting a graphical summary (Graphic) of several METARs. GNC 420(A) Pilot's Guide
  • Garmin GNC 420W | Pilots Guide - Page 218
    ID - Request NEXRAD data from a specific waypoint identifier. If 'From ID' updates. This setting provides best performance for the GDL 49. • The 'Manual Send?'(GDL 49) or 'Update Request?' (GDL 69) field is used to request METAR Data. 4) Use GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. K
  • Garmin GNC 420W | Pilots Guide - Page 219
    . There are four user-selectable parameter fields: only). 5) Select 'Manual Send?' or 'Update Request?' and press Viewing graphical METAR Data for a specific airport from the Map Page: updated every twelve minutes from the time of initial request. 190-00140-20 Rev. K GNC 420(A) Pilot's Guide and
  • Garmin GNC 420W | Pilots Guide - Page 220
    The Weather Legend is displayed (Figure 11-45) for the type of data that was selected. Use the small right knob and scroll through the various descriptions for the symbols that are shown. Press Data Figure 11-46 Textual METAR Page 11-30 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. K
  • Garmin GNC 420W | Pilots Guide - Page 221
    any hardware problems, the pilot can perform some quick troubleshooting steps to find the possible cause of a failure. First, ensure that the owner/operator of the aircraft in which the GDL 49 or GDL 69/69A is installed has subscribed to Echo Flight or XM Satellite Radio for a Service Plan, and
  • Garmin GNC 420W | Pilots Guide - Page 222
    of responses in the GDL 49's receive queue waiting to be sent to the GNC 420. • Sat ID/Connectivity - Shows the current satellite in view and also indicates This field shows the currently installed software version for the GDL 49. 11-32 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. K
  • Garmin GNC 420W | Pilots Guide - Page 223
    status and signal strength of the XM Satellite Radio weather service. Table 11-10 lists the messages that may be installed METAR database version in the GDL 69/69A. • GDL SW - This field shows the currently installed software version for the GDL 69/69A. 190-00140-20 Rev. K GNC 420(A) Pilot's Guide
  • Garmin GNC 420W | Pilots Guide - Page 224
    Unknown Table 11-14 Precipitation Graphics The symbol in Figure 11-48 indicates the ceiling at KMWM is marginal VFR, with heavy snow and low IFR visibility. The data age is 31-60 minutes old. 11-34 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. K
  • Garmin GNC 420W | Pilots Guide - Page 225
    SECTION 11 ADDITIONAL FEATURES Ceiling and Visibility - Flight Rules VFR Marginal VFR IFR Low IFR (green bars) (green bars) (yellow bars) (yellow bars) Table 11-15 and dewpoint. Differences are shown in degrees Fahrenheit. 190-00140-20 Rev. K GNC 420(A) Pilot's Guide and Reference 11-35
  • Garmin GNC 420W | Pilots Guide - Page 226
    displays the difference between the reported temperature and dewpoint as 7-10 degrees Fahrenheit at KSPW. Temperature Dewpoint Figure 11-50 Temp-Dewpoint Symbol 11-36 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. K
  • Garmin GNC 420W | Pilots Guide - Page 227
    DETECTION AND EXCLUSION Fault Detection and Exclusion (FDE) is incorporated in the Garmin GNC 420 main and GPS software version 3.00 and higher. FDE algorithms provide a basis for approval per the requirements for "GPS as a Primary Means of Navigation for Oceanic/Remote Operations", FAA Notice N8110
  • Garmin GNC 420W | Pilots Guide - Page 228
    route of flight). The trainer software and the document "400/500-series FDE Prediction Instructions" (190-00643-00) are available on Garmin's website for free download (www.garmin.com). Figure 12-2 Garmin 400-Series Trainer Software . 12-2 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev
  • Garmin GNC 420W | Pilots Guide - Page 229
    . The GNC 420 is configured to receive altitude serializer data (Icarus, Rosetta, or Shadin) and it is not being received. Or, the data was being received, but has been interrupted. If a grey code altitude input is available, it is used instead. If the problem persists, contact a Garmin dealer and
  • Garmin GNC 420W | Pilots Guide - Page 230
    -system communication between the main processor and the COM COM is not responding transceiver has failed. Operational status of the COM transceiver is unknown and the unit should be returned to a Garmin dealer for service. COM needs service The GNC 420 has detected a failure in its communications
  • Garmin GNC 420W | Pilots Guide - Page 231
    backlight failure The GNC 420 has detected a failure in the display backlighting. The unit should be taken to a Garmin dealer for service. Do not use for navigation The GNC 420 is in Demo Mode and must not be used for actual navigation. 190-00140-20 Rev. K GNC 420(A) Pilot's Guide and Reference
  • Garmin GNC 420W | Pilots Guide - Page 232
    installed (database change). GPS has failed The GNC 420 has detected a failure in its GPS receiver. The GPS receiver is not available and the unit should be returned to a Garmin dealer for service closest point cannot be created. 13-4 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. K
  • Garmin GNC 420W | Pilots Guide - Page 233
    GNC 420 should be taken to a Garmin dealer for service at the earliest convenience. Not receiving input No data has been received on the ARINC 429 channel 1 connection for a period exceeding data on 429 Channel 1 five seconds. If the problem persists, the installation should be checked by a Garmin
  • Garmin GNC 420W | Pilots Guide - Page 234
    scheduler message is [user entered text] displayed. Searching the sky The GNC 420 is searching the sky for GPS satellite almanac data or the GPS receiver is in arc approach the turn anticipation distance exceeds 90 seconds. 13-6 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. K
  • Garmin GNC 420W | Pilots Guide - Page 235
    One or more user waypoints were updated during a unit-to-unit crossfill operation. Waypoint memory is All 1000 user waypoint locations in the GNC 420's memory have been used. Delete full unwanted waypoints to make room for new entries. 190-00140-20 Rev. K GNC 420(A) Pilot's Guide and Reference
  • Garmin GNC 420W | Pilots Guide - Page 236
    is a list of abbreviations used on the GNC 420 and their meanings: ACTV Active DEN DEP DIS DME DOP DTK Database Density Departure Distance Distance Measuring Enroute °C CAS CDI CLR COM CRSR CTA CTAF CTR CTS Service Station Feet GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. K
  • Garmin GNC 420W | Pilots Guide - Page 237
    SECTION 13 - MESSAGES, ABBREVIATIONS, & NAV TERMS G/S gl GPS GS Glideslope Gallons Global Positioning System Ground Speed HDG hg HUL HWY Heading Nautical Miles Nearest Number OBS Omnibearing Selector OCN Oceanic 190-00140-20 Rev. K GNC 420(A) Pilot's Guide and Reference 13-9
  • Garmin GNC 420W | Pilots Guide - Page 238
    Speed Squelch Surface Standard Terminal Arrival Route Special Use Airspace TMA TRANS TRFC TRK TRSA twr TX Transition Traffic Track (also Ground Track) Terminal Radar Service Area Tower Transmit uni Unicom UTC Coordinated Universal GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. K
  • Garmin GNC 420W | Pilots Guide - Page 239
    SECTION 13 - MESSAGES, ABBREVIATIONS, & NAV TERMS 13.3 Navigation Terms The following navigation terms are used on the GNC 420 and in this Pilot's Guide. Refer to Figures 13-1 and 13-2 for graphic representation of navigation terms. NORTH WPT 2 DTK DIS PROFILE VERTICAL NAVIGATION BRG TRK XTK
  • Garmin GNC 420W | Pilots Guide - Page 240
    in time and based upon a known fuel consumption (flow) rate. MSA (minimum safe altitude) Uses Grid Minimum Off-route Altitudes (Grid MORAs) to determine a safe altitude within ten miles of the in either direction, left or right. 13-12 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. K
  • Garmin GNC 420W | Pilots Guide - Page 241
    Data Card Use The Jeppesen NavData Card, and the Terrain Data Card (if applicable) supplied with the GNC 420 can be installed or removed when the GNC 420 is on or off. If the NavData Card is not present when the unit is turned on, a 'No Jeppesen Aviation Database - Limited to user defined waypoints
  • Garmin GNC 420W | Pilots Guide - Page 242
    place, perpendicular to the face of the GNC 420 unit. 3) Grasp the top and bottom surfaces of the swing arm handle between your thumb and forefinger, and pull directly away from the face of the GNC 420 unit to remove the data card. A-2 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. K
  • Garmin GNC 420W | Pilots Guide - Page 243
    or encoded: Gillham/Greycode); Fuel Sensor; Fuel/Air Data * Earlier versions of the 420 were designed to be used with 28 Vdc power only. For questions on a particular installation, please refer to a Garmin authorized service center. 190-00140-20 Rev. K GNC 420(A) Pilot's Guide and Reference B-1
  • Garmin GNC 420W | Pilots Guide - Page 244
    APPENDIX B SPECIFICATIONS Blank Page B-2 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. K
  • Garmin GNC 420W | Pilots Guide - Page 245
    regarding the GNC 420's capabilities and operation. If there is a problem operating the unit, read through this appendix and refer to the reference section noted. If the answer to a particular question is not covered here, use the index to find the appropriate section elsewhere in this manual. If
  • Garmin GNC 420W | Pilots Guide - Page 246
    See Section 5.1 for instructions on saving and copying flight plans. Can I file slant Golf ('/G') using my GPS? Yes, the pilot may file the flight plan as '/G' if the GNC 420 is a certified A1 or A2 installation. If flying enroute, the pilot may file /G with an expired database only after having
  • Garmin GNC 420W | Pilots Guide - Page 247
    ' on selected waypoint Manually select course to next waypoint from HSI Indicates 'TO' or 'FROM' waypoint Cannot be set for final approach course or published holding patterns When OBS mode is active, the GNC 420 allows the pilot to select the desired course to/from a waypoint using the HSI (much
  • Garmin GNC 420W | Pilots Guide - Page 248
    legs. How do I fly the GPS with an autopilot and heading indicator heading bug? If the installation does not have an HSI, the pilot should make the course selections on the external CDI's OBS knob and the heading indicator heading bug. C-4 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev
  • Garmin GNC 420W | Pilots Guide - Page 249
    APPENDIX C TROUBLESHOOTING When does turn anticipation begin, and what bank angle is expected? The GNC 420 smooths adjacent leg transitions based upon a nominal 15º minute 30 nm 5 nm Enroute/Oceanic Figure C-7 CDI Scale Transition 190-00140-20 Rev. K GNC 420(A) Pilot's Guide and Reference C-5
  • Garmin GNC 420W | Pilots Guide - Page 250
    CDI scale, see Section 9.4. 22 nm nm 5 nm 5 nm GPS 5 nm 5 nm VOR Figure C-8 CDI Comparison What is the correct missed approach procedure? How do I select the missed approach holding point? To comply with TSO specifications, the GNC 420 does not automatically sequence past the MAP. The active-to
  • Garmin GNC 420W | Pilots Guide - Page 251
    Declutter 1-11, 3-7 Default NAV Page 1-10, 3-2 Delete user waypoints 13-2 Deleting flight plans 5-5 Density altitude 9-1, 9-2, 9-3, 9-7 Departures 1-4, 1-14, 5-9, 5-12, 5-14, 6-1, 6-25, 7-1, 7-13, 13-3 Departure time 9-7, 9-12, 9-16 190-00140-20 Rev. K GNC 420(A) Pilot's Guide and Reference I-1
  • Garmin GNC 420W | Pilots Guide - Page 252
    18 GDL 69/69A 11-18 Generic timer 9-15, 9-16 GPS iv GPS receiver status 3-23, 3-24 GPS Window 1-9 Graphic "track" indicator 3-20 Ground speed 1-11, Hold (waypoint) 6-9, 6-11, 6-24 I IFR procedures 1-14 Instrument Panel Self-Test Page 1-6 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. K
  • Garmin GNC 420W | Pilots Guide - Page 253
    21, 9-24 Main page groups 8-1, 9-1 Manual sequence 6-21, 6-25 MAP (missed approach minimum safe altitude) 3-3, 3-20, 13-9, 13-12 MSG Key 1-4 N NAV/COM Page 1-10, 1-13, 2-4, 3-18, 3-19 NAVAID iv, 3-10, 3-21 Page 8-6 Nearest User Waypoint Page 8-7 -20 Rev. K GNC 420(A) Pilot's Guide and Reference I-3
  • Garmin GNC 420W | Pilots Guide - Page 254
    left knob 1-3 Small right knob 1-3 Software/database version 9-12 Sort list 5-8, 9-15 Specifications v, B-1 Squelch 2-1, 13-10 Standby User Waypoint List 7-21, 7-22, 7-23 User Waypoint Page 7-16, 7-17, 7-19-7-22, 8-7 Utility Page 9-12, 9-14, 9-15, 9-17, 9-18, 9-19 I-4 GNC 420(A) Pilot's Guide
  • Garmin GNC 420W | Pilots Guide - Page 255
    Link 11-1, 11-18 Weather Legend Page 11-30 Winds aloft 9-1, 9-2, 9-3, 9-7 Wind Speed Graphics 11-35 WPT Page Group 5-15, 7-1, 7-2 INDEX 190-00140-20 Rev. K GNC 420(A) Pilot's Guide and Reference I-5
  • Garmin GNC 420W | Pilots Guide - Page 256
    Blank Page
  • Garmin GNC 420W | Pilots Guide - Page 257
  • Garmin GNC 420W | Pilots Guide - Page 258
    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.K. p: +44/ (0) 870.8501241 f: +44/ (0) 870.8501251 Garmin
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GNC 420(A)
Pilot’s Guide and Reference