
Section 3 Display Symbology
3-6
IDU-450 EFIS Software Version 8.0H (Rotorcraft)
1
st
Ed Nov 2018
The VNAV altitude bug is a visual reference or, when vertically integrated
with an autopilot either fully or partially integrated through the vertical mode
discrete input, as a control parameter for climbs or descents.
When vertically integrated with an autopilot:
When in altitude hold mode, the VNAV altitude bug
setting annunciation is green, and the VNAV altitude bug
is filled-magenta. During altitude hold capture, VNAV
altitude bug setting annunciation is green and flashes,
while the VNAV altitude bug is filled-magenta.
When in a climb or descent mode, the VNAV altitude bug
setting annunciation is white, and the VNAV altitude bug
is hollow-magenta.
Figure 3-11: VNAV Sub-Mode (Vertically Integrated)
When the VNAV altitude or target altitude differs from aircraft altitude to the
extent the associated bug is off-scale, the associated bug is “parked” in the
direction of the difference with half of the associated bug visible as in Figure
3-11.
3.2.4. Altitude
Display (VNAV Tile)
Figure 3-12: Altitude Display (VNAV Tile)
When enabled for performing VNAV with a manually selected altitude
entered,
VNAV (L2)
appears.