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16

190-00356-01 Rev F

APPROACHES

Selecting Approaches

In order to select an approach, you must first 

have an active direct-to or flight plan that termi-
nates at an airport with a published approach. 

1.   Press  the 

PROC 

key  to  display  the  procedures 

page. 

2.   Turn  the 

large  right 

knob to highlight “Select 
Approach?”  and  press 
the 

ENT key

3.   A  window  will  appear 

listing the available pro-
cedures. Turn  the 

large 

right 

knob to highlight 

the  desired  procedure 
and press the 

ENT 

key. 

4.   A  second  window  will 

appear  listing  the  avail-
able transitions. Turn the 

large right 

knob to high-

light the desired transition 
waypoint  and  press  the 

ENT 

key. The approach “Vectors” option assumes 

you will receive vectors to the final course segment 
of the approach and will provide navigation guid-
ance relative to the final approach course. 

5.   Turn the 

large right 

knob to highlight “Load?” 

or “Activate?”  and  press  the 

ENT 

key. “Load?” 

will add the procedure to the flight plan without 
immediately using it for navigation guidance. This 
allows you to continue navigating the original flight 
plan,  but  keeps  the  procedure  available  on  the 
active flight plan page for quick activation when 
needed. "Activate?" overrides the "en route" por-
tion of the active flight plan, proceeding directly to 
the "approach" portion. 

6.   For  non-GPS  approved  approaches,  a  reminder 

window will appear indi-
cating that GPS guidance 
on  such  approaches  is 
strictly  for  monitoring 
only—use  the  VLOC 
receiver and external CDI 
(or  HSI)  for  primary  navigation. To  confirm  this 
reminder,  highlight “Yes?”  and  press  the 

ENT 

key. 

Not all approaches in the database are approved for 

GPS use. As you select an approach, a 

GPS

” 

designa-

tion to the right of the procedure name indicates the 
procedure can be flown using the GPS receiver. 

Some 

procedures will not have this designation, meaning the GPS 
receiver may be used for supplemental navigation guidance 
only. If the GPS receiver cannot be used for primary guid-
ance, you must use the appropriate receiver for the selected 
approach (e.g., VOR or ADF).

 The final course segment of 

ILS approaches, for example, must be flown by tuning 
the VLOC receiver to the proper frequency and coupling 
the VLOC receiver to the external CDI (or HSI). 

A selected approach may be 

activated

 or 

loaded

. Activat-

ing the approach overrides the “en route” portion of the 
active flight plan, proceeding directly to the “approach” 
portion (for a full approach, directly to the approach 
transition). Activating the approach also initiates automatic 
CDI scaling transitions as the approach progresses. 

In many cases, it may be easiest to “Load” the full 

approach while still some distance away, en route to the 
destination airport. Later, if vectored to final, use the 
following steps to select “Activating an Approach with Vec-
tors-To-Final”—which makes the inbound course to the 
FAF waypoint active. Otherwise, activate the full approach 
using the “Activate Approach?” option. 

Summary of Contents for GNS 420AW

Page 1: ...190 00356 01 Rev F 400W Series Quick Reference...

Page 2: ...ucts and to make changes in the content without obligation to notify any person or organization of such changes or improvements Visit the Garmin Web site www garmin com for current updates and supplem...

Page 3: ...g the GPS receiver away from it WARNING VNAV is to be used for advisory purposes only VNAV messages or vertical speed required should not be used to maintain terrain or ATC clearances Terrain and ATC...

Page 4: ...ith traf fic lightning detection and weather interfaces like Ryan TCAD TIS from the Garmin GTX 330 Mode S transpon der L3 SKYWATCH or STORMSCOPE WX 500 With the FDE prediction program included with th...

Page 5: ...currently selected by the tuning cursor v In the GNC 420W and GNS 430W the small left knob is used to tune the kilohertz kHz value of the standby frequency for the COM transceiver or the VLOC receive...

Page 6: ...Press and hold this key to immediately display the Default NAV Page E The enter key ENT is used to approve an operation or complete data entry It is also used to confirm information such as during po...

Page 7: ...s sequencing to the next waypoint Press ing the OBS key again returns to normal operation with automatic sequencing of waypoints Whenever OBS mode is selected you may set the desired course to from a...

Page 8: ...ment panel self test page There may be more self test screens depending on optional equipment installed in your aircraft 4 The instrument panel self test page allows you to verify that the unit is com...

Page 9: ...desired frequency The COM and VLOC flip flop keys are used to swap the active and standby frequen cies Push in on small right knob and then turn the large right knob to move the GPS window cursor arou...

Page 10: ...the FPL key and using the small right knob to select the desired page FPL Group Active Flight Plan Flight Plan Catalog Procedures PROC Small right knob to select pages within the group Large right kno...

Page 11: ...and press the ENT key to select this option 3 Usethelarge right knob to highlight the data field you wish to change 4 Turn the small right knob to display the list of available data items Continue tur...

Page 12: ...map scale 2 Press the CLR key as needed to select the desired amount of map detail To Turn the Data Fields On Off on the Right Side of the Map 1 With the map page displayed press MENU to display an op...

Page 13: ...ncies as described in the previous procedure 2 To place a frequency in the standby field of the COM or VLOC window highlight the desired frequency and press the ENT key Terrain Page To display the TER...

Page 14: ...location of the desired destination waypoint As you spell the facility name or city the 400W series Spell N Find feature will select the first entry in the database based upon the characters you have...

Page 15: ...point page will appear with the waypoint identifier field highlighted 2 Turn the large right knob to highlight the facility name second line or the city third line field 3 Use the small and large righ...

Page 16: ...ndicate which part of the list is currently being viewed 3 To remove the flashing cursor press the small right knob To View Additional Information for a Nearby Airport 1 Highlight the identifier of th...

Page 17: ...Flight Plan and press the ENT key To Stop Navigating a Flight Plan 1 Press the FPL key 2 Press the MENU key to display the active flight plan options 3 Turn the large right knob to highlight Delete F...

Page 18: ...ng that GPS guidance on such approaches is strictly for monitoring only use the VLOC receiver and external CDI or HSI for primary navigation To confirm this reminder highlight Yes and press the ENT ke...

Page 19: ...ng the Select Approach option from the procedures page Otherwise you must first choose the airport then the approach procedure When a localizer based approach such as an ILS is loaded the desired freq...

Page 20: ...BS key again to return to automatic waypoint sequencing For course reversals waypoint sequencing is suspended for one trip around the holding pattern only after which it will return to automatic waypo...

Page 21: ...system is providing missed approach integrity and CDI full scale deflection 0 3 NM ENR En route CDI full scale deflection is 2 0 NM or current CDI scale selection whichever is smaller TERM Terminal C...

Page 22: ...20 190 00356 01 Rev F...

Page 23: ......

Page 24: ...T Inc 2345 Turner Rd S E Salem Oregon 97302 U S A Tel 503 581 8101 or 800 525 6726 Fax 503 364 2138 Garmin Europe Ltd Liberty House Hounsdown Business Park Southhampton SO40 9RB U K Tel 44 0 870 850 1...

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