Oh. So we
are talking ILS here :-) Yes, you deduced it right — no CATIII for Tu-154. Otherwise, you can fly her down ILS using AP or FD or manually. GPS "not fitted". Well, the 101 was equipped with an FMS, and we don't really know what other mods have been made, but it's still irrelevant as there were no ILS and no GPS procedures for Smolensk North.
So. ARRAKIS just pointed out in
http://www.pprune.org/rumours-news/4...ml#post5807001, that when all you have is PAR or a pair of NDBs or a combination thereof, you cannot go lower than 100-120m anyways.