Wonderful images indeed, they have an air of stark loneliness that is quite tangible and you have to ask where are these boats going, with what and why?
A year or so ago there was on the radio a recording of the captains radio transmissions as they chatted to each other on the long trips across these inland waters. It was played as a musical piece and was really quite lyrical and moving, although entirely in Russian. I'll see if I can find it on the web.