Kazan.

This is coolbert:

Vaunted and highly touted Russian submarine [Kazan] of the latest and most stealthy design over-rated? 

Cuba si, Kazan no?

"A Russian submarine [Kazan] that just left Cuba appears to be 'falling apart' with its soundproofing panels falling off, analyst says"

Thanks to Business Insider via Yahoo ^ | June 18th, 2024 | Thibault Spirlet | the tip from Freeper   https://tinyurl.com/3cy9z2zm

"One of Russia's newest and most advanced submarines, which just left Cuba, appears to be 'falling apart' and to have damage to its hull, an open-source-intelligence analyst said. Marijn Markus, a managing consultant at Capgemini, shared four photos of the nuclear-powered Kazan in a LinkedIn post on Monday. Markus said it appeared the sub's soundproofing panels were 'falling off' the front part of the submarine's hull. He said that would make the vessel 'very' loud underwater and compromise its stealth capabilities"

See from Newsweek an article the Kazan and the anechoic tile problems. Rather common to the submarine force of many nations it seems.  https://tinyurl.com/3zvh2fd7

coolbert.