Ron Natalie wrote:
Robert M. Gary wrote:

The mins right now on LOC approaches are lower than GPS approaches.
WAAS could enable lower mins, even if it didn't improvise a GS.


There are such approaches now: non-WAAS approaches with minimums
the same as the LOC minimums, and LNAV approaches without VNAV that
have minimums below the LOC ones.

Do you have an example? At SAC the LOC mins are about 300 AGL for the
last 5 nm of the approach, right over houses, etc. Perhaps GPS is only
allowed as an overlay for the LOC approaches with very high mins?

-Robert