Getting that Kilo to BSF tho would be some task. Black sea is closed so the Moscow canal have to be used but dunno how much capacity is there to deliver an entire submarine there.
Yes that route is also where most the locks in waterways system located.
The Russian Government has submitted its report on the development of inland water transport and maritime activities over the recent 6 years. According to the report published on the PortNews website, the capacity of transshipment facilities at seaports has increased by 24.4% to 1,053.3 million...
www.dredgingtoday.com
This is the latest report that I can find that talk on Russian effort to dredging the waterways to increase the capacities.
Video from Kazakhstan Petrochemical that shown their efforts to transport large Petrochemical equipment in Inland waterways (south part) from black sea to caspian.
It is shown even in the trickiest part of waterways system, basically Russian already increase the depth to enable larger and heavier equipment to move. Those barges even with shallow drought, but with that heavy bulk weight to transport, I do see will go down considerably near bottom of waterways.
So the question seems how far the work that Russian has done recently on enlarging the locks and deepening the waterways. Just seems from this reports, moving SSK like Kilo along the waterways is doable. They are capable on moving larger corvetes in waterways, which should make them capable moving SSK like Kilo or Lada from white sea to black sea.
If that's true, then the assessment from some western pundits on Russia can't move more submarine to black sea because Turkey close Bosporus, is moot. This is also shown why Russia will fight for control of Azov and Crimea.