wrote in message ...
Lockheed employee wrote:

I have a Jeppesen briefing bulletin (DEN 00-A) that states:

LNAV/VNAV must have WAAS equipment approved for precision approach, or
RNP-0.3 system based on GPS or DME/DME, with an IFR approach approved
Baro-VNAV system. It appears that either is suitable for going to
VNAV minimums


There are a whole new set of criteria for WAAS approaches, which are called "LPV"
instead of "VNAV." Jeppesen *may* be correct, in that WAAS-certified equipment that
can use the LPV IAPs when they appear can also use existing VNAV minimums. But, I'd
feel a lot better hearing that directly from FAA's Flight Standards instead of
Jeppesen. ~

Agreed, since the exact numbers have been somewhat of a moving target
(not to mention the acronyms . Latest I've heard is that LPV
decision heights might be in the 350' - 400' range.

An interesting thing to note is how the integrity requirements change
with the procedure. LPV drops the Horizontal down, but uses the same
Vertical Alert Limit as LNAV/VNAV. This might explain some of the
rationale for considering using existing VNAV mins.

| HAL | VAL |
=======================
LNAV | 555.6 | X |

LNAV/ | 555.6 | 50.0 |
VNAV

LPV | 40.0 | 50.0 |

Notes: All numbers are expressed in Meters.
Table best viewed in Monospaced font.


There's a good general info page at:
http://www2.faa.gov/ntap/NTAP03JUL10/GEN03003.HTM - "Wide Area
Augmentation System (WAAS) Commissioning Information, WAAS and GPS
NOTAM Changes, and Removal of inverted A NA from select RNAV (GPS)
and
GPS Approach Charts"


Regards,
Jon