https://www.popularmechanics.com/military/navy-ships/a42791211/russia-retires-hunt-for-red-october-submarine/

Russia Retires the Last of ‘The Hunt for Red October’ Submarines

More than 40 years after it first entered service, Russia has decommissioned the submarine Dmitri Donskoy, and with it a chapter in submarine history has come to a close. Once one of the deadliest—and biggest—weapons known to mankind, Dmitri Donskoy is headed to the scrapyard. The Akula-class submarines, each of which packed the equivalent of 20 million tons of TNT, were the inspiration for the 1984 novel and 1990 film The Hunt for Red October.

Red October marker?