Mooney M20M, Pilot Operating Handbook

Page: 291 / 377

GI 275 Part 23 AML STC
190-02446-12 Rev. 4
Airplane Flight Manual Supplement Page 51 of 70
GPS Approach Mode Annunciations
When interfaced with a certified GPS navigator and the GPS navigator is the
selected source, the GI 275 HSI and HSI Map display the current GPS
operational mode. The GI 275 abbreviates the approach modes as defined in the
table below.
Description Annunciation
Lateral Navigation LNAV
Localizer Performance with Vertical Guidance LPV
Localizer Performance without Vertical Guidance LP
Localizer performance approach with advisory
vertical guidance
LP+V
Lateral and vertical navigation approach L/VNAV
Lateral navigation approach with advisory vertical
guidance
LNAV+V
VFR GPS
A Garmin GI 275 may be interfaced with its own optional VFR GPS antenna. In
the event that the certified GPS navigation information becomes unavailable, the
GI 275 VFR GPS (VGPS) provides 2D GPS position information and Direct To
navigation capability. Aside from selecting VGPS as the CDI source and then
selecting a Direct To waypoint, airport, or navigational aid within the GI 275
Direct To Menu, there is no pilot action required to enable or use the VFR GPS.
When VGPS data is in use, "VGPS” is annunciated as the selected navigation
source.
Synthetic Vision and Terrain alerting functionality is available with the VGPS.