The ship they sunk in the channel was the Ochakov. a Kara-Class late-60’s-era cruiser, that was already heading for the scrapper’s torch.
Laid up for 27 years, since 1987. Was to be rebuilt in the 90’s, but caught fire in the yard, heavily damaging it. Finally was written off and decommissioned in 2011.
One of Putin’s “Cash for Clunkers” ships.
Now swimming with the fishes, KGB style.