Garmin Cirrus Perspective SR20 Pilot's Manual page 473

INTERCEPTING AND FLYING A DME ARC
The AFCS will intercept and track a DME arc that is part of the active flight plan provided that GPS
Navigation Mode is engaged, GPS is the active navigation source on the CDI, and the DME arc segment is
the active flight plan leg. It is important to note that automatic navigation of DME arcs is based on GPS.
Thus, even if the APR key is pressed and LOC or VOR Approach Mode is armed prior to reaching the Initial
Approach Fix (IAF), Approach Mode will not activate until the arc segment is completed.
If the pilot decides to intercept the arc at a location other than the published IAF (i.e. ATC provides vectors
to intercept the arc) and subsequently selects Heading Mode or Roll Mode, the AFCS will not automatically
intercept or track the arc unless the pilot activates the arc leg of the flight plan and arms GPS Navigation
Mode. The AFCS will not intercept and fly a DME arc before reaching an IAF that defines the beginning of the
arc segment. Likewise, if at any point while established on the DME arc the pilot deselects GPS Navigation
Mode, the AFCS will no longer track the arc.
190-00820-08 Rev. A
Roll
Command Bars Indicate
Level with the Horizon
Figure 7-26 Level Mode Annunciation
Cirrus Perspective by Garmin – Pilot's Guide for the SR20/SR22/SR22T
™
AUTOMATIC FLIGHT CONTROL SYSTEM
Pitch
459