Garmin G900X Pilot's Manual page 280

GPS NAVIGATION
d) Turn the large FMS Knob to place the cursor in the VNV altitude field as shown in Figure 5-108.
e) An altitude of 10,000 feet is entered as requested by ATC.
f) Press the ENT Key. The cursor is now displayed in the VNV offset field as shown in Figure 5-109.
g) Enter the offset, or distance from the waypoint at which the selected altitude is reached. In this case, three
miles prior to OPSHN is entered. In other words, the G900X gives vertical guidance so the aircraft arrives at an
altitude of 10,000 feet three miles prior to OPSHN.
5-122
Figure 5-108 Enter VNV Altitude
Figure 5-109 Enter VNV Offset Distance
Garmin G900X Pilot's Guide 190-00726-00 Rev. A