According to FAR 61.57, the regulation requires different experience requirements when a pilot uses FTD or ATD for their experience minimums. So I have tried to look up the difference between those two but I don't really understand.
According to Advisory Circular 61-136A, the definition of ATD is a training device, other than a FFS or FTD, that includes
a replica of aircraft instruments, equipment, panels, and controls in an open flight deck area or an enclosed aircraft cockpit.
The definition of FTD, according to FAR Part 1, is also
a replica of aircraft instruments, equipment, panels, and controls in an open flight deck area or an enclosed aircraft cockpit
They look pretty much same to me.
Could you give me the examples of those two?