Even 10% in four months is pretty stout. But I suspect the UK has fairly precise bounds on their "estimates" of the size of the Russian fleet, and their losses.

Even 10% in four months is pretty stout. But I suspect the UK has fairly precise bounds on their "estimates" of the size of the Russian fleet, and their losses. In any case, maybe you could post sources? From a quick google, Russia lost at least several other large ships, include troop ships and missile launchers. I don't know whether Ukraine destroyed them as they claimed, but if not, then Russia has rather serious maintenance issues. From afar, all this might seem like minor issue, but over the past few decades the US has gone through several wars without losing any ships to enemy action, and I think the national freak-out if that changed would be pretty dramatic.