Your image was too small to zoom up enough, but why 'radar' is required is a mystery! It looks just like a 'standard old-fashioned NDB approach. Are you saying that the 'approved descent' might not be over the NDB? It seems bizarre to have a 2 NDB approach with a functioning precision radar following. Why on earth not just fly the PAR? Does it mean that if the radar fails you cannot fly the approach?
Even with my very 'rusty' engineering Russian, vakakaaa's post was too much to follow
Why, in Smolensk, do we not 'see' any ATC approach descent instruction on the CVR transcript?
Your last para lost me - what happens after you 'continue'?