[Intel Source: The Sub Report] One of the things submariners worry about is getting the "technical" stuff covered up when the boat goes into drydock. Back in the day, we'd always schedule our drydocking times for gaps in Soviet satellite coverage, so we'd have everything covered before the next pass. Nowadays, we're more worried about tour boats; we don't want some tourist snapping a picture of the screw, so that's always one of the first things covered.
The new openness in Russia seems to have resulted in the same problems, but it looks like they aren't quite as good at "keeping their fly zipped", as it were. From this web page (it looks like it might be a general "city information"-type page for the Black Sea Fleet) we see some cool pictures of Russian Kilo-class boats. Here's one of them in drydock, as the tour boat starts coming up the river:
Here's another view:
And here's a blow-up I made of an interesting portion of the last picture: