While I have seen how well ALE 400 works, I am not convinced that it is worth the effort to invest in activity due to the lack of other hams using the mode. While ALE400 make sense to me, I can't see hams, en masse , switching to it. I still think that a better option would be the increased development of NBEMS PSK and MFSK with ARQ as implemented in FLDIGI. While perhaps not as robust as ALE 400 FAE , it is far more likely to be used by hams if there is more publicity about NBEMS.
Andy K3UK
