Cirrus DESIGN SR22T Pilot Operating Handbook page 460

Section 9
Supplements
Global Positioning System Steering (GPSS) Mode
1. Select a reliable GPS signal on the NAV receiver.
2. Engage GPSS mode:
a. If NAV mode is already engaged, press NAV on Programmer/
Computer once.
b. If NAV mode is not engaged, press NAV on Programmer/
Computer twice.
3. The NAV annunciation and GPSS will illuminate and the autopilot
will steer the aircraft along the predefined course programmed into
the NAV receiver.
During the GPSS mode of operation, the autopilot will not accept
any course error input from the PFD Course Pointer.
If there are no programmed course segments in the Programmer/
Computer upon attempted engagement of the GPSS mode, the
FAIL annunciation will appear, NAV and GPSS annunciations will
flash, and the autopilot will hold the aircraft's wings level.
To manually select an intercept angle:
a. Set the PFD Heading Bug to the desired course, such that the
difference between this heading and the desired course is the
intercept angle.
b. Press and hold HDG and simultaneously press NAV twice on
the Programmer/Computer.
annunciations will illuminate and the airplane will turn to the
selected heading.
c. When the on-course intercept turn begins the HDG mode will
disengage and the annunciation will go out.
10 of 24
HDG, NAV,
Revision 01: 01-06-10
Cirrus Design
SR22 / SR22T
and GPSS
P/N 13772-140