Malaysian Airlines MH370 contact lost

[DrPhillipa]

IRPilot2006: Nav Data must be recorded in the FDR where "available and used". It is not "required" per se.

One presumes that any GPS and WAAS systems would also be included here.

Operation Parameters ... Primary navigation system reference*: GNSS, INS, VOR/DME, MLS, Loran C, ILS

Those parameters designated by an (*) are to be recorded if an information source for the parameter is used by aeroplane systems and/or flight crew to operate the aeroplane.