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Last year a Chinese Type 39A/B Yuan class submarine was noted as being missing in the vicinity of Bassett Shoal. Sadly, the Chinese search effort with 'research' vessels ended and intel indicates that some 35 to 40 PLAN staff have been quietly removed from the active roster with no official explanation.
Likely they all suffered from mysterious and simultaneous brain haemorraghes.
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A recent SNIE (Special National Intelligence Estimate) is reported to have observed a massive fall-off in readiness, capability, and degraded force multipliers for the Russian military. The Russians have been particularly hard hit by their inability to replace Ukrainian military suppliers for tank engines, tank tracks, tanks, helicopter engines, a whole spectrum of missile kit, and other resources that the Russians lost access to when they went to war against Ukraine. Ironically, Russian acts of sabotage inside Ukraine have permanently destroyed key arms factories that the Russian military cannot replace.

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To date the Russians have seized over 100 ships in the Sea of Azov. Their crews are also being held prisoner at a military prison in Rostov. Four of the ships are small fishing boats of Romanian registry and the Romanians are becoming agitated over what their media is calling an act of war and piracy. The rest of the ships are expected to be of Ukrainian registry.
Do you mean large commercial ships or is it more fishing trawlers?
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Since 1999 over two million educated and middle class Russians have emigrated from Russia. Coincidentally, this is also the same year that the Putin regime took power.
Time to rebuild the Berlin Wall then.