Raim Prediction - Garmin GTN 625 Pilot's Manual

14.3
Foreword
RAIM Prediction predicts if GPS coverage is available for your current location
Getting
or at a specified waypoint at any time and date. RAIM performs checks to
Started
ensure that the GTN unit has adequate satellite geometry during your flight.
Xpdr Ctrl
RAIM availability is near 100% in Oceanic, En Route and Terminal phases
of flight. Because the FAA' s TSO requirements for non-precision approaches
Com/Nav
specify significantly better satellite coverage than other flight phases,
RAIM may not be available when flying some approaches. The GTN unit
FPL
automatically monitors RAIM during approach operations and warns you if
RAIM is not available. In such cases, use a non-GPS based approach. RAIM
Direct-To
prediction helps you plan for a pending flight to confirm GPS operation during
an approach.
Proc
RAIM prediction only predicts the availability of Fault Detection (FD)
Wpt Info
integrity in the absence of SBAS corrections. It cannot predict the availability
of LPV or L/VNAV approaches. The FAA provides a NOTAM service for LPV
Map
approach availability.
Traffic
Terrain
Weather
Touch To Select
Nearest
Local Arrival Date
Services/
Music
Utilities
System
Messages
Symbols
Appendix
Index
14-10

RAIM Prediction

1. While viewing the Utilities page, touch the RAIM Prediction
key.
Touch To Select
Destination
Waypoint
Touch To Select
Local Arrival Time
Figure 14-13 Utility RAIM Prediction Page
2. Touch the Waypoint key and select the waypoint for RAIM
Prediction.
3. Touch the Arrival Date key and select the date of arrival at
the selected waypoint.
4. Touch the Arrival Time key and select the local time of
expected arrival at the selected waypoint.
Garmin GTN 625/635/650 Pilot's Guide 190-01004-03 Rev. F