Garmin G900X Pilot's Manual - page 261

GPS NAVIGATION

190-00726-00 Rev. A

5-103

Garmin G900X Pilot’s Guide

INSERTING OPTIONAL AIRWAY WAYPOINTS

To easily insert one of the “optional” airway waypoints into the flight plan.  To make this easy, they are 

provided on a list like FPL, NRST and RECENT.  The list is called AIRWAY.   To add one of these to the flight 

plan, place the cursor over and turn the small 

FMS

 Knob to the left, selecting the list which which has the 

desired waypoint, select one and press the 

ENT

 Key to insert it into the flight plan.

Figure 5-86  Inserting Optional Airspace Waypoints

DIRECTIONAL AIRWAYS/INVERTING FLIGHT PLANS

Some airways have directional restrictions on all or part of the route.  Airway “A2” in Europe has a directional 

restriction over the whole route such that it can be flown only in the direction MTD-ABB-BNE-DEVAL.

Airway “UR975” in North Africa has more complicated directional restrictions within the list of airway 

waypoints AMANO, VAKOR, LIBRO NELDA, DIRKA, GZO, KOSET and SARKI:

• Starting from AMANO, the airway can be flown only to LIBRO.

• Starting from SARKI, the airway can be flown only to LIBRO.

• Between NELDA and GZO, the airway can be flown in either direction.

The system inverts the airway waypoint sequence and removes all of the airway headers.  

  NOTE: 

 In the US, airways that are “one-way” for specified hours of operation are not uncommon.  These 

airways are always be bi-directional in the G900X database – this is an ARINC 424 limitation.

AIRWAYS AND DATABASE UPDATES

Flight  plans  with  airways  can  be  saved;  however,  when  the  database  if  updated,  the  airways  must  be 

reloaded, similar to what must be done for procedures.

The basic process is that each airway segment is reloaded from the database given the entry waypoint, the 

airway identifier and the exit waypoint.  This re-loads the sequence of waypoints between the entry and exit 

waypoints (the sequence may change when the database is updated).

If “optional” airway waypoints have been inserted within the airway sequence, those waypoints are included 

when the airway is updated whenever possible.

The update of an airway can fail during this process.  If that happens, the airway is removed from the flight 

plan.  The following things could cause the airway update to fail: