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Section 3 Display Symbology
1
st
Ed Nov 2018
IDU-450 EFIS Software Version 8.0H (Rotorcraft)
3-9
The pilot-selectable VSI bug setting (100 fpm resolution)
in this example is set to 1000 fpm descent rate. The
vertical speed bug is used either as a visual reference
or, when vertically integrated with an autopilot (either
fully integrated or partially integrated through use of the
vertical mode discrete input), as a control parameter for
climbs or descents. It is mutually exclusive with the
airspeed bug.
Figure 3-17: VSI Bug
When vertically integrated with an autopilot, the VSI
bug-setting annunciation is green with the speed bug
filled-white when in VSI climb or descent mode.
Otherwise, the VSI bug setting is white, and VSI bug is
hollow-white.
Figure 3-18: VSI Bug (Vertically Integrated)
When not vertically integrated with an autopilot, the VSI bug setting
annunciation is white, and the vertical speed bug is filled-white at all times.
3.3.3. Normal AGL Indication
AGL altitude is displayed in two formats above the course deviation
indicator (normal) and as the (analog) AGL indicator. These are mutually
exclusive of each other and driven by the AGL altitude source used for
TAWS but not displayed when the source is invalid. Source indication
designates the source for either format as follows:
R
= Radar altitude
G
= GPS/SBAS geodetic height less database ground elevation
B
= Barometric altitude less database ground elevation
(SVS Basic) AGL
Based on GPS Altitude
(SVS TAWS) AGL
Based on Radar Altimeter
Figure 3-19: Normal AGL Indication