IFD500 Series Pilot Guide
1-56 System Overview
SBAS VS NON-SBAS OPERATIONS
The IFD supports both SBAS and non-SBAS operations. In each
case, the IFD is still considered a “/G” system for flight plan filing
purposes.
When configured for and connected to an approved SBAS
antenna at installation, the IFD serves as a fully-certified SBAS
GPS navigator. Published SBAS procedures will be available
and presented in the various drop-down list choices in the FMS
and SBAS glideslopes will be displayed, when appropriate.
When configured for or connected to a non-SBAS antenna or a
non-approved SBAS antenna at installation, the IFD will not
provide any SBAS functionality. For example, SBAS approaches
such as LPVs will not be presented as an available choice within
the FMS.
For dual IFD installations in which one IFD is SBAS capable and
the other IFD is non-SBAS capable (a perfectly acceptable
combination under the STC), there are some limitations on the
nature of data sharing between the IFDs. In this case, FMS-
related data is not shared between the IFDs (e.g. flight plans,
stored routes and user waypoints).
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