Wizofoz
Thank you, but I still have some doubts
As they said, one of the main causes of Tu-134 crash in Petrozavodsk, Russia, is using of GPS on NDB approach, while some waypoints coordinates on final approach mismatch the actual WGS-84 coordinates. It's typical for Russia region where the SK-42 were used instead WGS-84 for long time.
AC120-29A states: 4.4.2. FMS Use for Procedures Other Than xLS or RNAV. FMS may be used to conduct VOR, VOR/DME, NDB, NDB/DME, LOC, and LOC Back Course approaches when suitable navigation position updating which
provides required accuracy and integrity is used by the FMS (e.g., DME-DME-IRS, or scanning DME, or VOR/DME, or GNSS position updating, or Localizer (LOC) updating, etc.).
So, I can use LNAV on any NDB approach while FMS in GNSS or D/D or V/D position updating? Or only charts with "NDB (GNSS)" statement?
Thank you