Navigation Source; To Change Between Navigation Sources; To Enable/Disable Obs Mode While Navigating With Gps - Garmin G1000 Pilot's Manual

FLIGHT INSTRUMENTS

Navigation Source

The HSI can display two sources of navigation, GPS
or NAV (VOR, localizer, and glideslope). In GPS mode
the flight plan legs are sequenced automatically. Enabling
OBS mode suspends auto sequencing of waypoints, but
retains the current "active-to" waypoint as the navigation
reference even after passing the waypoint. When OBS is
disabled, the GPS returns to normal operation, with au-
tomatic sequencing of waypoints. OBS mode also allows
the pilot to set the desired course TO/FROM a waypoint.
Color indicates the current navigation source, magenta
(for GPS ) or green (for VOR and LOC). As the user crosses
the MAP, "SUSP" appears on the HSI in place of OBS and
the OBS softkey now reads "SUSP", indicating that auto-
matic sequencing of approach waypoints is suspended at
the MAP. A yellow 'INTEG' and 'WARN' may appear on the
HSI when the following occurs:
• INTEG – RAIM is not available
• WARN – GPS detects a position error

To change between navigation sources:

Press the CDI softkey to change from GPS to
1.
VOR1 or LOC1. This places the cyan tuning box
over the NAV1 standby frequency in the upper
left corner of the PFD.
Press the CDI softkey again to change from
2.
VOR1 or LOC1 to VOR2 or LOC2. This places
the cyan tuning box over the NAV2 standby
frequency.
Press the CDI softkey a third time to return to
3.
GPS.
3-22 Garmin G1000 PFD Pilot's Guide for Cessna Nav III
To enable/disable OBS mode while navigating
with GPS:
Press the OBS softkey to select OBS Mode.
1.
Turn the small CRS knob to select the desired
2.
course TO/FROM the waypoint.
Press the OBS softkey again to return to normal
3.
operation.
Figure 3.4.23 GPS INTEG, GPS SUSP, LOC1 and VOR2
190-00387-02 Rev. A