mm43,
I feel I understand as well as anybody and far better than most what may have happened to AF 447 and how. I am very open, indeed keen, for new insight. Which I don't get when people who talk about ditching completely confuse the physical units they adduce. Akin to a violinist trying to play a Brahms Sonata but not being quite sure which of the four strings to tune to A=440.
PBL