Pilot's Operating Handbook
Section 7
Description
Edition 0 - October 31, 2013
Rev. 6
Page 7.14.5
GARMIN Integrated Flight Deck (GIFD) approaches
The purpose of this section is to provide an overview of the GIFD capabilities and
operation related to GIFD Approaches.
Detailed descriptions as well as operating instructions of these approaches are
provided in the applicable Pilot’s Guide and Cockpit Reference Guide.
RNP approaches operation
The GIFD is capable of performing approaches with GNSS guidance also designated
as RNP approaches.
RNAV (GPS) or RNAV (GNSS) – LNAV, LNAV+V
LNAV approaches provide lateral GPS-based guidance to legs defined by the
navigation database.
Vertical deviations may be available if the necessary information to construct a vertical
path is contained in the database.
Any vertical path information for LNAV approaches is strictly advisory.
There is no guarantee that stepdown fix altitudes will be honored and the crew must
level off at the MDA if the runway is not visible.
LNAV approaches may be executed with or without SBAS, and advisory vertical
guidance is dependent on sufficient GPS vertical error estimates rather than SBAS
vertical integrity.
LNAV+V approaches do not downgrade in general because they do not require
SBAS, although high GPS vertical error estimate anomalies could result in loss of
advisory vertical guidance.
If GPS is lost the LNAV approach will be aborted.
RNAV (GPS) or RNAV (GNSS) – L/VNAV
LNAV/VNAV approaches add published vertical guidance in addition to LNAV
guidance. They are different from LNAV+V in that the vertical deviations are not
advisory, but rather published guidance.
The minimums of an LNAV/VNAV approach represent a DA rather than an MDA.
Execution of an LNAV/VNAV approach does not require SBAS integrity, as long as a
system is configured to support barometric VNAV for approach.
If SBAS integrity is available, it will be used to provide vertical guidance.
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