"Stan Prevost" wrote:
The GPS box cannot do that without knowledge of the wind. A fancy FMS
which determines the wind correction from the autopilot can do that, but
how can a standalone GPS box, WAAS or not, do that?

Stan,

According to a Garmin rep I spoke to at NBAA, it can compensate if it is
connected to an airdata computer. Even the current 430/530 models can be
connected to an ADC, which allows them to display TAS and winds.

-Mike