BY ORDER OF THE SECRETARY OF THE AIR FORCE AIR FORCE ...

AFMAN 11-217V1 3 JANUARY 2005 177
is level prior to MDA.
8.5.6.3.4.2. LNAV/VNAV. LNAV/VNAV minimums are based on lateral
and vertical guidance to the published DA.
8.5.6.3.4.2.1. NOTE: Barometric VNAV (BARO-VNAV) systems
compute a vertical path based on aircraft barometric altimetry systems.
This vertical path may be greatly affected by non-standard temperatures,
incorrect or rapidly changing altimeter settings, and altimeter error. Pilots
should closely monitor compliance with step down fix altitude constraints
and may not use Baro-VNAV guidance for reference below the
published DA. Also note that deviations from the VNAV path are often
linear as opposed to angular, i.e. one dot deviation represents a fixed
number of feet from the vertical path, regardless of distance to the runway
waypoint.
8.5.6.3.4.3. LPV minimums. LPV minimums may support precision
approach minimums as low as 200' HAT and 1/2 statute mile (SM) visibility.
Pilots will be informed that the notation “LPV PA” or “GLS” on the first line
of minimums in U.S. Government Terminal Procedure Publication charts
satisfies all the requirements of the precision system. Pilots will be informed
that the precision system requirements are not met by the notation "LPV"
without the letters "PA" on the first line of minimums. In this latter case, since
the landing environment does not support the low visibility operations,
minimums no lower than 300' HAT and 3/4 SM visibility will be published.
LPV minimums are published as a Decision Altitude (DA).