6-12 Arrivals / Approaches / Landing
This is essentially the same as a non-SBAS GPS approach. It is
flown as any other non-precision approach – observing step down
restrictions, descend to MDA, fly at MDA altitude to the MAP;,
and execute the missed approach procedure if appropriate. Since
there is no vertical guidance associated with this type of
approach, the VDI is not displayed.
LP (Localizer Performance) These approaches have localizer
performance but no vertical guidance associated with them. Use
the published “LP” minimums. “LP” will be annunciated as the
HDI source.
LP+V (Localizer Performance with Advisory Vertical
Guidance) This mode provides the same lateral navigation as
LP, but also presents an advisory glideslope deviation for display.
The GPS draws a 3-D picture of the approach based on crossing
the FAF at the depicted altitude, which is typically a 3 degree
angle to the touchdown zone. This type of approach remains a
non-precision approach and does not consider any step-down
limitations. Use the published “LP” minimums. The Nav Mode
datablock will display “LP+V” for the approach type.
This type of approach is automatically coupled to the autopilot,
meaning that somewhere in the vicinity of the FAF, with “LP+V”
annunciated as the HDI source, the FMS will automatically toggle
the autopilot mode to NAV APPR and GS will either arm or
engage depending on your position relative to the glide path.
LNAV+V (Lateral Navigation with Vertical Information) This
mode provides the same lateral navigation as LNAV, but presents
an ILS GS-like presentation on the VDI. The GPS draws a 3-D
picture of the approach based on crossing the FAF at the
depicted altitude. Then it follows a glidepath from the published
approach, which is typically a 3 degree angle to the touchdown
zone. This type of approach remains a non-precision approach
and does not consider any step-down limitations.
For this approach type, manual coupling to the autopilot is
permitted. After “LNAV+V” is annunciated as the HDI source but
prior to FAF, the NAV (or APPR) button on the autopilot must be
pressed. GS will arm or engage depending on your position
relative to the glide slope. Fly coupled to the MDA, observing any
step down restrictions as needed. If a level off at the MDA is
desired, the ALT button must be pressed on the autopilot.
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