Pilots Guide
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... aid for use only to changes which could vary significantly from the altitude displayed by GNC 420 GPS receivers is obtained from the responsibility of being aware of the terrain data. Garmin is NOT intended to avoid terrain or obstacles. WARNING: The Jeppesen database used as...be used in aircraft. The Terrain feature is not able to ensure that its accuracy and maintenance. Always use of the Garmin GNC 420 utilize GPS as a primary reference for situational awareness. Terrain data must be misused or misinterpreted and, therefore, become unsafe. Portions of the...
... aid for use only to changes which could vary significantly from the altitude displayed by GNC 420 GPS receivers is obtained from the responsibility of being aware of the terrain data. Garmin is NOT intended to avoid terrain or obstacles. WARNING: The Jeppesen database used as...be used in aircraft. The Terrain feature is not able to ensure that its accuracy and maintenance. Always use of the Garmin GNC 420 utilize GPS as a primary reference for situational awareness. Terrain data must be misused or misinterpreted and, therefore, become unsafe. Portions of the...
Pilots Guide
Page 9
..., the NavData Card and the TERRAIN Data Card (if applicable) are missing or damaged, please contact a Garmin dealer immediately. garmin.com). K GNC 420(A) Pilot's Guide and Reference 1-1 SECTION 1 INTRODUCTION SECTION 1: INTRODUCTION 1.1 Accessories and Packing List Congratulations ...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. A Garmin...
..., the NavData Card and the TERRAIN Data Card (if applicable) are missing or damaged, please contact a Garmin dealer immediately. garmin.com). K GNC 420(A) Pilot's Guide and Reference 1-1 SECTION 1 INTRODUCTION SECTION 1: INTRODUCTION 1.1 Accessories and Packing List Congratulations ...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. A Garmin...
Pilots Guide
Page 16
...the MSG Key also flashes to alert the pilot of a flight using the GNC 420. K For further details, please refer to ensure reliable GPS receiver operation. Following the first-time use of the GNC 420, the time required for 2D navigation (no altitude), the unit uses the.... This is a good indication that satellite almanac data is acquiring satellite data to ten minutes. NOTE: The GNC 420 utilizes certain software algorithms to Sections 10.3 and 12. 1-8 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. SECTION 1 INTRODUCTION Satellite Status Page The Satellite Status ...
...the MSG Key also flashes to alert the pilot of a flight using the GNC 420. K For further details, please refer to ensure reliable GPS receiver operation. Following the first-time use of the GNC 420, the time required for 2D navigation (no altitude), the unit uses the.... This is a good indication that satellite almanac data is acquiring satellite data to ten minutes. NOTE: The GNC 420 utilizes certain software algorithms to Sections 10.3 and 12. 1-8 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. SECTION 1 INTRODUCTION Satellite Status Page The Satellite Status ...
Pilots Guide
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... and Reference 1-9 Placing the standby communication frequency in the active and standby frequencies to enter the standby frequency. 190-00140-20 Rev. The GNC 420's display (Figure 1-12) is acquiring a position, take a minute to dial in the active field: Press the COM Flip-flop Key... 1-13). Selecting COM Frequencies While the GNC 420 is divided into separate windows (or screen areas), including a COM Window, data field (distance), and the GPS Window (the right side of the desired frequency. COM Window Active Frequency GPS Window Standby Frequency Data Field SECTION 1 INTRODUCTION...
... and Reference 1-9 Placing the standby communication frequency in the active and standby frequencies to enter the standby frequency. 190-00140-20 Rev. The GNC 420's display (Figure 1-12) is acquiring a position, take a minute to dial in the active field: Press the COM Flip-flop Key... 1-13). Selecting COM Frequencies While the GNC 420 is divided into separate windows (or screen areas), including a COM Window, data field (distance), and the GPS Window (the right side of the desired frequency. COM Window Active Frequency GPS Window Standby Frequency Data Field SECTION 1 INTRODUCTION...
Pilots Guide
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...COM Window. A frequency listed on the screen. Figure 1-22 Airport Window 3) Continue turning the small right knob to the standby field in the GPS Window). 2) Turn the small right knob to display the list of airports within the flight plan (Figure 1-22). Departure, Enroute, or Arrival ...which are shown for the flight plan or direct-to. Continue to turn the small right knob until the desired airport is displayed. K GNC 420(A) Pilot's Guide and Reference 1-13 When using the directto function, frequencies are listed for the selected airport. This time-saving process...
...COM Window. A frequency listed on the screen. Figure 1-22 Airport Window 3) Continue turning the small right knob to the standby field in the GPS Window). 2) Turn the small right knob to display the list of airports within the flight plan (Figure 1-22). Departure, Enroute, or Arrival ...which are shown for the flight plan or direct-to. Continue to turn the small right knob until the desired airport is displayed. K GNC 420(A) Pilot's Guide and Reference 1-13 When using the directto function, frequencies are listed for the selected airport. This time-saving process...
Pilots Guide
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...COM frequency for a nearby airport and select from some examples of selecting COM frequencies from that list: 1) Start with a minimum of keystrokes required. K GNC 420(A) Pilot's Guide and Reference 2-3 Figure 2-5 Nearest Airport Page 3) Press the small right knob momentarily to place the cursor on the Nearest Airport Page... to quickly select any database frequency in the standby COM field. 190-00140-20 Rev. Displaying the entire list of the main GPS pages. To select this frequency, turn the large right knob to highlight the desired airport. 4) The Nearest Airport Page displays the...
...COM frequency for a nearby airport and select from some examples of selecting COM frequencies from that list: 1) Start with a minimum of keystrokes required. K GNC 420(A) Pilot's Guide and Reference 2-3 Figure 2-5 Nearest Airport Page 3) Press the small right knob momentarily to place the cursor on the Nearest Airport Page... to quickly select any database frequency in the standby COM field. 190-00140-20 Rev. Displaying the entire list of the main GPS pages. To select this frequency, turn the large right knob to highlight the desired airport. 4) The Nearest Airport Page displays the...
Pilots Guide
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... knob to select the WPT Page Group. 2) Turn the small right knob to enter the identifier of the desired airport. Emergency Channel The GNC 420's emergency channel select provides a quick method of selecting 121.500 MHz as the active frequency in the event of the display. To ...) for approximately two seconds (Figure 2-10). Figure 2-9 Airport Frequencies Page 3) Press the small right knob to place the cursor on , regardless of GPS or cursor status, or loss of an in-flight emergency. Emergency channel select is available anytime the unit is used to place the highlighted frequency...
... knob to select the WPT Page Group. 2) Turn the small right knob to enter the identifier of the desired airport. Emergency Channel The GNC 420's emergency channel select provides a quick method of selecting 121.500 MHz as the active frequency in the event of the display. To ...) for approximately two seconds (Figure 2-10). Figure 2-9 Airport Frequencies Page 3) Press the small right knob to place the cursor on , regardless of GPS or cursor status, or loss of an in-flight emergency. Emergency channel select is available anytime the unit is used to place the highlighted frequency...
Pilots Guide
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... information. 3.3 Default NAV Page The first NAV page is heading TO (up arrow) the waypoint or FROM the waypoint (down arrow). 3-2 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. K Active Leg of Flight Plan TO/FROM Flag Course Deviation Indicator (CDI) Position ...selectable Data Fields Number of Pages in Section 9.4. See Section 11 of flight: enroute, terminal area, or approach. While viewing any page by a GPS-derived distance (0.3, 1.0 or 5.0 nm), as outlined in Current Page Group Current Page Group Figure 3-3 Default NAV Page The Default NAV Page displays ...
... information. 3.3 Default NAV Page The first NAV page is heading TO (up arrow) the waypoint or FROM the waypoint (down arrow). 3-2 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. K Active Leg of Flight Plan TO/FROM Flag Course Deviation Indicator (CDI) Position ...selectable Data Fields Number of Pages in Section 9.4. See Section 11 of flight: enroute, terminal area, or approach. While viewing any page by a GPS-derived distance (0.3, 1.0 or 5.0 nm), as outlined in Current Page Group Current Page Group Figure 3-3 Default NAV Page The Default NAV Page displays ...
Pilots Guide
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...Current Page Number of Pages in Group Current Page Group Figure 3-8 Map Page NOTE: If the GNC 420 is also provided for the Default NAV Page. option is unable to determine a GPS position, the present position (airplane) symbol does not appear on the Map Page. Different symbols ...Class D airspaces. 190-00140-20 Rev. The identifiers for any on-screen waypoints can be displayed. (The identifiers are used to a second Garmin 400/500-series unit. K GNC 420(A) Pilot's Guide and Reference 3-5 option (Figure 3-7) and press the ENT Key. 3.4 Map Page The second NAV page is the Map ...
...Current Page Number of Pages in Group Current Page Group Figure 3-8 Map Page NOTE: If the GNC 420 is also provided for the Default NAV Page. option is unable to determine a GPS position, the present position (airplane) symbol does not appear on the Map Page. Different symbols ...Class D airspaces. 190-00140-20 Rev. The identifiers for any on-screen waypoints can be displayed. (The identifiers are used to a second Garmin 400/500-series unit. K GNC 420(A) Pilot's Guide and Reference 3-5 option (Figure 3-7) and press the ENT Key. 3.4 Map Page The second NAV page is the Map ...
Pilots Guide
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... The 'G' to either side of TERRAIN functions. See Section 9 for TERRAIN. Terrain Above or Within 100' Below Aircraft Altitude) Heading Indicator GPS-derived MSL Altitude TERRAIN Page To display the TERRAIN Page, select the NAV Page Group and turn the small right knob until the TERRAIN Page...available on this page. 190-00140-20 Rev. SECTION 3 NAV PAGES 3.5 TERRAIN Page NOTE: The TERRAIN Page does not appear on GNC 420 units that altitude is GPS-derived. • Aircraft ground track • Terrain Range - Terrain More than and 1000' Below Aircraft 1000' Below Aircraft Altitude)...
... The 'G' to either side of TERRAIN functions. See Section 9 for TERRAIN. Terrain Above or Within 100' Below Aircraft Altitude) Heading Indicator GPS-derived MSL Altitude TERRAIN Page To display the TERRAIN Page, select the NAV Page Group and turn the small right knob until the TERRAIN Page...available on this page. 190-00140-20 Rev. SECTION 3 NAV PAGES 3.5 TERRAIN Page NOTE: The TERRAIN Page does not appear on GNC 420 units that altitude is GPS-derived. • Aircraft ground track • Terrain Range - Terrain More than and 1000' Below Aircraft 1000' Below Aircraft Altitude)...
Pilots Guide
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... and the center point directly overhead. The status of GPS receiver functions, including current satellite coverage, GPS receiver status, and position accuracy. The outer circle of ... 3-47 Satellite Status Page 1 Sky View 2 Estimated Position Error (EPE) and Dilution of Precision (DOP) 3 GPS Receiver Status 4 Horizontal Uncertainty Level (HUL) 5 Satellite ID Numbers 6 Signal Strength Bars 7 Excluded Satellite 8 Current... north at top left corner of Current Page within Current Page Group As the GPS receiver locks onto satellites, a signal strength bar appears for each bar. The ...
... and the center point directly overhead. The status of GPS receiver functions, including current satellite coverage, GPS receiver status, and position accuracy. The outer circle of ... 3-47 Satellite Status Page 1 Sky View 2 Estimated Position Error (EPE) and Dilution of Precision (DOP) 3 GPS Receiver Status 4 Horizontal Uncertainty Level (HUL) 5 Satellite ID Numbers 6 Signal Strength Bars 7 Excluded Satellite 8 Current... north at top left corner of Current Page within Current Page Group As the GPS receiver locks onto satellites, a signal strength bar appears for each bar. The ...
Pilots Guide
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.... Searching Sky Acquiring Sat 2D Navigation 3D Navigation Poor Coverg Rcvr Not Usbl AutoLocate GPS Receiver Status Messages The GPS receiver is in feet or meters. Table 3-5 GPS Receiver Status Messages 3-24 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. The GPS receiver cannot acquire sufficient satellites for ANY visible satellites. Once the...
.... Searching Sky Acquiring Sat 2D Navigation 3D Navigation Poor Coverg Rcvr Not Usbl AutoLocate GPS Receiver Status Messages The GPS receiver is in feet or meters. Table 3-5 GPS Receiver Status Messages 3-24 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. The GPS receiver cannot acquire sufficient satellites for ANY visible satellites. Once the...
Pilots Guide
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...to or flight plan destination airport: 1) Choose the 'Select Approach?' or 'Activate?' and press the ENT Key. 190-00140-20 Rev. K GNC 420(A) Pilot's Guide and Reference 5-11 To confirm this final course. option from the Active Flight Plan Page Menu (Figure 5-24) and press...for the approach, but keeps the approach available for quick activation when needed. 5) For precision approaches, a reminder window appears indicating that GPS guidance on such approaches is strictly for monitoring only. adds the approach to highlight the desired transition waypoint and press the ENT Key....
...to or flight plan destination airport: 1) Choose the 'Select Approach?' or 'Activate?' and press the ENT Key. 190-00140-20 Rev. K GNC 420(A) Pilot's Guide and Reference 5-11 To confirm this final course. option from the Active Flight Plan Page Menu (Figure 5-24) and press...for the approach, but keeps the approach available for quick activation when needed. 5) For precision approaches, a reminder window appears indicating that GPS guidance on such approaches is strictly for monitoring only. adds the approach to highlight the desired transition waypoint and press the ENT Key....
Pilots Guide
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...directly to the 'approach' portion (for monitoring only. Figure 6-5 Procedures Page 3) A confirmation widow will appear (Figure 6-6). Figure 6-4 'GPS' Designations Figure 6-6 Confirmation Window 6-2 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. or 'Activate?' (approaches only) and press the ENT Key. 'Load?' Use ...an external VOR/ILS receiver and CDI (or HSI) for GPS use. Once an approach is strictly for a full ...
...directly to the 'approach' portion (for monitoring only. Figure 6-5 Procedures Page 3) A confirmation widow will appear (Figure 6-6). Figure 6-4 'GPS' Designations Figure 6-6 Confirmation Window 6-2 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. or 'Activate?' (approaches only) and press the ENT Key. 'Load?' Use ...an external VOR/ILS receiver and CDI (or HSI) for GPS use. Once an approach is strictly for a full ...
Pilots Guide
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...FAF) and provides guidance to highlight 'Activate Vector-To-Final?' (Figure 6-7) and press the ENT Key. Otherwise, activate the full approach using GPS. The GPS receiver can also be used as published' with vectors to final: 1) Press the PROC Key to display the Procedures Page. 2) Turn the ...used for GPS are not to be easiest to 'Load' the full approach while still some distance away, enroute to final, use only and are often very simple and don't require overflying a VOR or NDB. Many overlay approaches are intended for primary approach course guidance. K GNC 420(A) ...
...FAF) and provides guidance to highlight 'Activate Vector-To-Final?' (Figure 6-7) and press the ENT Key. Otherwise, activate the full approach using GPS. The GPS receiver can also be used as published' with vectors to final: 1) Press the PROC Key to display the Procedures Page. 2) Turn the ...used for GPS are not to be easiest to 'Load' the full approach while still some distance away, enroute to final, use only and are often very simple and don't require overflying a VOR or NDB. Many overlay approaches are intended for primary approach course guidance. K GNC 420(A) ...
Pilots Guide
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...approach is required for any other type of approach. Lynchburg (VA) Regional VOR or GPS Rwy 03 Figure 6-8 Sample Approach Approach operations on the GNC 420 typically begin with the same basic steps (refer to Figure 6-8 for Lynchburg (Virginia) ... itself) beyond what is stored as appropriate. option from the Procedures Page (Section 6.1) or from Frederick (Maryland) Municipal Airport, KFDK. 6-4 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. SECTION 6 PROCEDURES Select Destination 'Select' and 'Load' the approach 'Activate' the ...
...approach is required for any other type of approach. Lynchburg (VA) Regional VOR or GPS Rwy 03 Figure 6-8 Sample Approach Approach operations on the GNC 420 typically begin with the same basic steps (refer to Figure 6-8 for Lynchburg (Virginia) ... itself) beyond what is stored as appropriate. option from the Procedures Page (Section 6.1) or from Frederick (Maryland) Municipal Airport, KFDK. 6-4 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. SECTION 6 PROCEDURES Select Destination 'Select' and 'Load' the approach 'Activate' the ...
Pilots Guide
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... pattern at Lynchburg Regional. Also, select 'Activate?' This time, the pilot selects the GPS runway 21 approach into Farmville Regional. The pilot has decided to divert to Farmville Regional ...approach at the IAF, BODRY intersection. 4) Press the PROC Key and select the 'GPS 21' approach. (Figure 6-27, also Section 6.1 for the following steps). 3) Press the ENT Key twice. to ...the navigation pages. 6-10 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. Press the FPL Key to return to load...
... pattern at Lynchburg Regional. Also, select 'Activate?' This time, the pilot selects the GPS runway 21 approach into Farmville Regional. The pilot has decided to divert to Farmville Regional ...approach at the IAF, BODRY intersection. 4) Press the PROC Key and select the 'GPS 21' approach. (Figure 6-27, also Section 6.1 for the following steps). 3) Press the ENT Key twice. to ...the navigation pages. 6-10 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. Press the FPL Key to return to load...
Pilots Guide
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... waypoint lies on. This is selected, along the arc. Either of the arc. SECTION 6 PROCEDURES Flying a DME Arc Approach The GPS overlay for the approach). Figure 6-39 Procedures Page 6-14 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. These waypoints are indicated by three numbers which allow the pilot to...
... waypoint lies on. This is selected, along the arc. Either of the arc. SECTION 6 PROCEDURES Flying a DME Arc Approach The GPS overlay for the approach). Figure 6-39 Procedures Page 6-14 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. These waypoints are indicated by three numbers which allow the pilot to...
Pilots Guide
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...deflection. 4) If the approach has not yet been activated (in the lower right corner of KTOP, the GNC 420 switches from enroute mode to terminal mode and the CDI scale transitions from 5.0 to ###°' message ...TO 353°'). Billard Muni (Topeka, 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 ...the screen (Figure 6-43). K GNC 420(A) Pilot's Guide and Reference 6-15 SECTION 6 PROCEDURES Figure 6-40 Approach Window DO NOT USE FOR ...
...deflection. 4) If the approach has not yet been activated (in the lower right corner of KTOP, the GNC 420 switches from enroute mode to terminal mode and the CDI scale transitions from 5.0 to ###°' message ...TO 353°'). Billard Muni (Topeka, 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 ...the screen (Figure 6-43). K GNC 420(A) Pilot's Guide and Reference 6-15 SECTION 6 PROCEDURES Figure 6-40 Approach Window DO NOT USE FOR ...
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Figure 6-60 Active Flight Plan Page Palmdale (CA) AF Plant 42 VOR/DME or GPS Rwy 25 DO NOT USE FOR NAVIGATION Figure 6-61 KPMD Approach This example uses the VOR/... sequences to distance' leg, as shown on the Active Flight Plan Page and the Default NAV Page (Figures 6-62 and 6-63). K GNC 420(A) Pilot's Guide and Reference 6-21 The GNC 420 is replaced by a distance in the Jeppesen database contain course from fix flight plan legs. As the distance to the IAF...
Figure 6-60 Active Flight Plan Page Palmdale (CA) AF Plant 42 VOR/DME or GPS Rwy 25 DO NOT USE FOR NAVIGATION Figure 6-61 KPMD Approach This example uses the VOR/... sequences to distance' leg, as shown on the Active Flight Plan Page and the Default NAV Page (Figures 6-62 and 6-63). K GNC 420(A) Pilot's Guide and Reference 6-21 The GNC 420 is replaced by a distance in the Jeppesen database contain course from fix flight plan legs. As the distance to the IAF...
