I’ve had that pleasure in the Gibraltar strait years ago. A crazy Ivan, by a Russian Fast Attack doing his thing. It’ll wake you up on your first patrol.
Boats used to come into the shipyard all the time with dents and scrapes on them back in the Soviet days.
I wonder how many partially submerged or neutrally buoyant containers are hit?
Two vessels in the round the world race hit submerged objects in the 40s and were lost. That would be a horrible wake-up call for a solo sailor.