And yes, pilots there mentioned that TAWS would be un-appliccable, because Smolensk military is not in the maps, may be yet, it's 9 months ago they decided it can be used for civil aviation.
But as Smolensk local forum points out - no nothing "civil" as minimum Russian local, ever so far landed in it, likely they the citizens lived without airport at all, since their Smolensk Southern was closed up.
And that yes, likely the TAWS warning system will be switched off by the pilots for constantly screaming, below some level? But of this they were not sure.
However they wrote the should be a howling siren? like a strong sound, the simple other TU? airport? system, in the plane, when a plane passes the near Beakon below the proper height. Or above it. Or - misses it? Didn't understand properly, need to look up. In short - something had them warned, simple, and very loud at that.