These are propaganda coups for the Russians. They’re dragging anchors and getting away with it.
Can’t EU countries block Russian vessels navigating the Baltic sea?
To access the Baltic sea from the North sea any ship must cross the Danish straits. Same question.
It gives the impression they’re winning and makes the EU and NATO look weak.
However, that wouldn’t be good for the fragile ecosystem in the Baltic sea.
What about they sink in the port, in Mediterranean, and other places? Only by accident of course.
In Petersburg, blocking the entire access, ideally.
In Ust-Luga…