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Section 3 Display Symbology
1
st
Ed Nov 2018
IDU-450 EFIS Software Version 8.0H (Rotorcraft)
3-5
When in altitude hold mode, the target altitude bug
setting annunciation is green, while the target altitude
bug is filled-white.
When in a climb or descent mode, the target altitude bug
setting annunciation is white, and the target altitude bug
is hollow-white.
During altitude hold capture, the target altitude bug
setting annunciation is green and flashes, while the
target altitude bug is filled-white.
Figure 3-8: Target Altitude Bug (Vertically
Integrated)
When not vertically integrated with an autopilot, the
target altitude bug setting annunciation is white, and the
target altitude bug is filled-white at all times.
Figure 3-9: Target Altitude Bug (Not Vertically
Integrated)
3.2.3. VNAV Sub-Mode
When in VNAV sub-mode, the altitude scale shows the active waypoint
VNAV altitude (if it exists) with a bug symbol geometrically interacting with
the altitude box pointer. The VNAV altitude bug setting is annunciated
above the altitude scale with a resolution of 100 feet.
When not vertically integrated with a fully integrated
digital autopilot, the VNAV altitude bug setting
annunciation includes “VNAV” indicating VNAV altitude
sub-mode. When vertically integrated with a fully
integrated digital autopilot, this legend is not needed,
because an equivalent indication appears in the
autopilot mode annunciation area.
Figure 3-10: VNAV Sub-Mode (Not Vertically
Integrated)