Garmin Cirrus Perspective SR20 Pilot's Manual page 464

AUTOMATIC FLIGHT CONTROL SYSTEM
GLIDESLOPE MODE (GS)
Glideslope Mode is available for LOC/ILS approaches to capture and track the glideslope. When Glideslope
Mode is armed (annunciated as 'GS' in white), LOC Approach Mode is armed as the lateral flight director
mode.
Selecting Glideslope Mode:
1) Ensure a valid localizer frequency is tuned.
2) Ensure that LOC is the selected navigation source (use the CDI Softkey to cycle through navigation sources if
necessary).
3) Press the APR Key.
Or :
1) Ensure that GPS is the selected navigation source (use the CDI Softkey to cycle through navigation sources if
necessary).
2) Ensure a LOC/ILS approach is loaded into the active flight plan.
3) Ensure the corresponding LOC frequency is tuned.
4) Press the APR Key.
Once LOC is the navigation source, the localizer and glideslope can be captured. Upon reaching the glideslope,
the flight director transitions to Glideslope Mode and begins to capture and track the glideslope.
Active ILS
Frequency Tuned
NAV2 (localizer) is Selected
Navigation Source
Cirrus Perspective
450
Figure 7-17 Glideslope Mode Armed
Approach
Mode Active
Command Bars Indicate Descent
On Localizer/ Glideslope Path
Figure 7-18 Glideslope Mode
by Garmin – Pilot's Guide for the SR20/SR22/SR22T
™
Glideslope
Mode Active
Glideslope
Indicator
190-00820-08 Rev. A