Garmin G900X Pilot's Manual - page 285
GPS NAVIGATION
190-00726-00 Rev. A
5-127
Garmin G900X Pilot’s Guide
e)
Press the
ENT
Key to designate this altitude constraint value for use in computing vertical guidance. This
altitude value is now displayed as light blue text. Note that altitude values are now filled in for waypoints back
to where the previous altitude value was entered for OPSHN.
Altitude constraint values associated with the Final Approach Fix (FAF) and waypoints beyond the FAF cannot be
designated for vertical guidance. These altitude values are always displayed as white text, as in Figure 5-117.
Vertical guidance to the FAF and on to the Missed Approach Point (MAP) is given using the WAAS GPS altitude
source, therefore, the displayed altitude values are for reference only.
Figure 5-117 Vertical Guidance is Active to the FAF
14)
As the aircraft approaches OPSHN, it may be desirable to adjust the quickness, or steepness, of the upcoming
descent is. The default Flight Path Angle (FPA) is -3.0 degrees and a required vertical speed is computed to
maintain the -3.0 FPA. To change the vertical flight path, perform the following steps.
a)
Select the
VNV PROF
Softkey to place the cursor in the target vertical speed field (VS TGT) as shown in Figure
5-118.
b)
At this point, the descent vertical speed can be selected, or the FPA can be selected. Turn the large
FMS
Knob
to select the desired selection field, then turn the small
FMS
Knob to enter the desired value.
Note the information now displayed in the ‘CURRENT VNV PROFILE’ box. Also, note the offset waypoint and
gray circle are now displayed on the map. The gray circle marks the Top of Descent (TOD). In this example,
vertical guidance is provided at the TOD that results in a -3.0 degree FPA descent to an altitude of 10,000 feet
upon reaching the offset waypoint.