Vertical Navigation (VNV) Indications
When a VNV ight plan has been activated, VNV indications (VNV Target
Altitude, RVSI, VDI) appear on the PFD in conjunction with the “TOD within 1
minute” message and “Vertical track” voice alert. See the Flight Management
and AFCS sections for details on VNV features. VNV indications are removed
from the PFD according to the criteria listed in the table.
Figure 7-27 – Vertical Navigation Indications (PFD)
Criteria
VNV Indication Removed
Required
Vertical Speed
(RVSI)
Vertical
Deviation
(VDI)
VNV
Target
Altitude*
Aircraft > 1 min before the next TOD due to ight plan
change.
X X X
VNV cancelled (CNCL VNV softkey pressed on MFD). X X X
Distance to active waypoint cannot be computed
due to unsupported ight plan leg type (see Flight
Management Section).
X X X
Aircraft > 250 feet below active VNV Target Altitude. X X X
Current crosstrack or track angle error has exceeded
limit.
X X X
Active altitude-constrained waypoint can not be
reached within maximum allowed ight path angle and
vertical speed.
X X
Table 7-1 – VNV Indication Removal Criteria
VNV Target
Altitude
GPS is the
Selected
Navigation
Source
Phase of
Flight
Required
Vertical
Speed
Indicator
Vertical
Deviation
Indicator