Pilot's Operating Handbook
Section 7
Description
Edition 1 - January 15, 2018
Rev. 3
Page 7.14.10
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.
During execution of a GPS approach with LNAV/VNAV service levels, while the
aircraft is between the FAF and MAP, excessive deviation indicators appear as white
vertical lines to indicate an area where the vertical deviation exceeds ±75 feet.
If the glide-path indicator is within an area of excessive deviation, the glide-path
indicator becomes yellow and the vertical lines also become yellow.
RNAV (GPS) or RNAV (GNSS) –
LPV
LPV approaches provide both localizer precision lateral guidance and a vertical path
definition.
SBAS integrity is required to execute the approach.
BARO-VNAV approaches
The GIFD provides the ability to conduct barometric based VNAV operations while
conducting certain GPS approaches using an automatically generated temperature
compensated glidepath.
Baro-VNAV Approach functionality is separate and distinct from enroute and terminal
descent VNAV functions.
PIM - DO NOT USE FOR FLIGHT OPERATIONS
