2.4
Flight Planning
For flight planning purposes, in areas where SBAS coverage is not available, the
flight crew must check RAIM availability.
Within the United States, RAIM availability can be determined using the
Garmin WFDE Prediction program, Garmin part number 006-A0154-04
(included in GTN trainer) software version 3.00 or later approved version
with Garmin approved antennas or the FAA's enroute and terminal RAIM
prediction website: www.raimprediction.net, or by contacting a Flight
Service Station.
Within Europe, RAIM availability can be determined using the Garmin
WFDE Prediction program or Europe's AUGER GPS RAIM Prediction
Tool at http://augur.ecacnav.com/augur/app/home.
For other areas, use the Garmin WFDE Prediction program.
This RAIM availability requirement is not necessary if SBAS coverage is
confirmed to be available along the entire route of flight. The route planning and
WFDE prediction program may be downloaded from the Garmin website on the
internet. For information on using the WFDE Prediction Program, refer to
Garmin WAAS FDE Prediction Program, part number 190-00643-01, 'WFDE
Prediction Program Instructions'.
For flight planning purposes, for operations within the U.S. National Airspace
System on RNP and RNAV procedures when SBAS signals are not available,
the availability of GPS RAIM shall be confirmed for the intended route of flight.
In the event of a predicted continuous loss of RAIM of more than five minutes
for any part of the intended route of flight, the flight shall be delayed, canceled,
or rerouted on a track where RAIM requirements can be met. The flight may
also be re-planned using non-GPS based navigational capabilities.
For flight planning purposes for operations within European B-RNAV/RNAV-5
and P-RNAV airspace, if more than one satellite is scheduled to be out of
service, then the availability of GPS RAIM shall be confirmed for the intended
flight (route and time). In the event of a predicted continuous loss of RAIM of
more than five minutes for any part of the intended flight, the flight shall be
delayed, canceled, or rerouted on a track where RAIM requirements can be met.
Applicable to dual installations consisting of two Garmin GNSS units:
For flight planning purposes, for operations where the route requires
Class II navigation the aircraft's operator or flight crew must use the
Garmin WFDE Prediction program to demonstrate that there are no
outages on the specified route that would prevent the Garmin GNSS
navigation system to provide GPS Class II navigation in oceanic and
remote areas of operation that requires RNP-10 or RNP-4 capability. If
the Garmin WFDE Prediction program indicates fault exclusion (FDE)
will be unavailable for more than 34 minutes in accordance with FAA
Order 8400.12A for RNP-10 requirements, or 25 minutes in accordance
190-01007-A2 Rev. 6
Page 10
AFMS, Garmin GTN GPS/SBAS System
FAA APPROVED
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