Garmin GFC 600 Manual page 28

TRANSITION to GPS APPROACH from VERTICAL NAVIGATION
(Optional Feature)
1. Navigation Source ................................................................................................. SELECT CDI to GPS
2. Approach Procedure ................................................................. LOAD into the GPS navigator flight plan
3. CDI............................................................................................. SET / VERIFY desired track
4. Altitude Preselect................................................ADJUST to desired altitude below current altitude
5. GMC 605 VNV Key....................................................................................................PRESS
6. Bold or subdued font VPTH annunciation............................................................. VERIFY on GMC 605
7. GMC 605 APR Key....................................................................................................PRESS
8. Bold or subdued font GPS and GP annunciations.................................................. VERIFY on GMC 605
9. Airspeed..........................................................................MAINTAIN 90 KIAS or greater (recommended)
If the altitude preselect is not set at least 75 FT below the current aircraft altitude, the
autopilot will not capture the vertical navigation path.
The autopilot can capture the vertical navigation path from above or below.
Under certain display conditions, VPTH and GP armed modes are combined into a single
"GP/V" annunciation.
If the Course Deviation Indicator (CDI) is greater than half-scale deflection, the autopilot
will arm the GPS mode. The pilot must ensure that the current heading will result in a
capture of the selected course. If the CDI is within half scale deflection, the autopilot will
enter the capture mode when the APR key is pressed.
When the selected GPS approach includes vertical guidance (LPV, LNAV/VNAV,
LNAV+V, LP+V), glidepath coupling is automatically armed when the APR key is
pressed. The glidepath cannot be captured until the lateral approach path is captured.
The autopilot can capture the glidepath from above or below the glidepath.
GFC 600 Autopilot Installed in Piper PA-46-310P/350P
Page 28 of 46
(VERIFY aircraft flight path will intercept the vertical navigation profile)
NOTE
190-02011-11 Rev. 2