GPS use for NAV when coded not in WGS84

[FE Hoppy]

Ejet procedures for non WGS84 or NAD83 is to deselect GPS position determination below transition alt.

[galaxy flyer]

Rsiano

I can't find the definitive reference for that comment--the nearest, I got was a two meter bias between the two datums. But, I'll check the Jepps, nixt time I'm in the office. That comment might also only applicable in the US.

GF