KAUG AUGUSTA STATE

04/001 - WAAS LPV WAAS LNAV/VNAV OTS WIE UNTIL UFN

This Notam has been posted, well, since April.

No one seems to be sure of what it means.

Translating the abbreviations into English is easy enough. The Notam
basically states that the LPV and LNAV/VNAV approaches are out of service
until further notice.

BUT,

Published guidance, that I have been able to locate, with regard to GPS
WAAS Notams indicates that the terms "unreliable" or "unavailable" should
be used and says nothing about OTS. If the Notam does read UNREL or
UNAVAIL, guidance allows you to execute the approach if the signal is
adequate.

Again, there is no guidance regarding OTS.

Furthermore, the office in OK that issues GPS Notams tell me it didn't come
from them, and it is a D-Notam. They don't know what it means or who
issued it.

I've contacted (or been bounced from) a few other offices having to do with
Notams, without finding anyone who can explain this.

(When I called the Bangor FSS, they said they didn't know and advised me to
contact the "FAA" :-))

My sense is that this may be a Notam that was issued contrary to guidance,
and should have been removed long ago, but was not. But perhaps someone
has a better explanation.

And, two days ago, the signal on an LPV approach at that airport was
adequate for my CNX80 to give me an LPV annunciation.
Ron (EPM) (N5843Q, Mooney M20E) (CP, ASEL, ASES, IA)