Avidyne IFD540, Руководство пилота

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5-25 Navigation
for the approach type.
LPV (Localizer Precision with Vertical Guidance)
The lateral guidance is significantly more precise than LNAV, and
equivalent to that of a localizer. Vertical guidance is provided to
minimums as low as 200’ AGL above the touchdown zone.
Lateral tolerance starts out at 0.3 NM full-scale (slightly tighter
than a localizer at the FAF), transitioning to 350 feet either side at
the runway threshold. The steering remains linear all the way
without the difficult to follow swings of a VHF localizer. The
vertical guidance is precise and has a DA/DH (shown as “DA(H)”
on approach charts) rather than a MDA. The Nav Mode datablock
will display “LPV” for the approach type.
LP (Localizer Performance)
These approaches have localizer performance but no vertical
guidance associated with them. Use the published “LP”
minimums. The Nav Mode datablock will display “LP” for the
approach type.
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 on the
external deviation indicator. 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.