Vertical Speed Indicator (Vsi); Vertical Deviation - Garmin Socata TBM850 Pilot's Manual

VERTICAL SPEED INDICATOR (VSI)

The Vertical Speed Indicator (VSI) displays the aircraft vertical speed on a fixed scale with labels at 2000 and
4000 fpm and minor tick marks every 1000 fpm (Figure 2-13). Digits appear in the pointer when the climb or
descent rate is greater than 100 fpm. If the rate of ascent/descent exceeds 4000 fpm, the pointer appears at the
edge of the tape and the rate appears inside the pointer.
A magenta chevron is displayed on the VSI as the Required Vertical Speed for reaching a VNV Target Altitude
once the "TOD [Top of Descent] within 1 minute" alert has been generated. See the Flight Management
and AFCS sections for details on VNV features, and refer to Section 2.2, Supplemental Flight Data, for more
information about VNV indications on the PFD.

VERTICAL DEVIATION

The Vertical Deviation Indicator (VDI) is a magenta chevron to indicate the baro-VNV vertical deviation when
Vertical Navigation (VNV) is being used. The VDI (Figure 2-13) appears in conjunction with the "TOD within
1 minute" alert. Full-scale deflection (two dots) is 1000 feet. The VDI is removed from the display if vertical
deviation becomes invalid. See the Flight Management and AFCS sections for details on VNV features, and refer
to Section 2.2, Supplemental Flight Data, for more information about VNV indications on the PFD.
The Glideslope Indicator (Figure 2-14) appears to the left of the Altimeter whenever an ILS frequency is tuned
in the active NAV field and the aircraft heading and selected course are within 107˚. A green diamond acts as
the Glideslope Indicator, like a glideslope needle on a conventional indicator. If a localizer frequency is tuned
and there is no glideslope, "NO GS" is annunciated in place of the diamond.
The glidepath is analogous to the glideslope for GPS approaches supporting SBAS vertical guidance (LNAV+V,
LNAV/VNAV, LPV). When an approach of this type is loaded into the flight plan and GPS is the selected
navigation source, the Glidepath Indicator (Figure 2-15) appears as a magenta diamond when the aircraft
reaches a point prior to the FAF. If the approach type changes past the final approach fix (FAF), "NO GP" is
displayed in place of the diamond.
Full-scale deflection of two dots is 1000 feet.
Vertical
Deviation
Indicator
Required
Vertical
Speed
Indicator
Figure 2-13 Vertical Speed and
Deviation Indicators (VSI and VDI)
190-00709-04 Rev. A
VNV
Target
Altitude
Vertical
Speed
Indicator
Glideslope
Indicator
Vertical
Speed
Pointer
Figure 2-14 Glideslope Indicator
Garmin G1000 Pilot's Guide for the Socata TBM 850
FLIGHT INSTRUMENTS
Marker
Beacon
Annunciation
Glidepath
Indicator
Figure 2-15 Glidepath Indicator
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