In 1968, a Soviet “research vessel” secretly shadowed the U.S. Navy off the East Coast — until it stumbled upon something it was never meant to find: America’s top-secret underwater surveillance network, SOSUS. What followed was one of the strangest incidents of the Cold War — a spy ship that vanished after recording the very signals it was trying to uncover.This documentary dives deep into the story of Pribaltika, the KGB’s disappearing spy ship, and how its loss helped shape decades of undersea espionage between the U.S. and the Soviet Union.🔔 Subscribe for more Cold War stories every week: Cold War Stories#ColdWar #ColdWarStories #SovietNavy #KGB #CIA #GRU #SOSUS #UnderseaSurveillance #NavalIntelligence #1968 #Pribaltika #ColdWarDocumentary #SubmarineWarfare #AcousticWarfare #SpyShip #MaritimeEspionage #SovietSpyTrawler #USNavySecrets #OceanSurveillance #ColdWarTechnology #IntelligenceOperations #ProjectAzorian #SovietVsUSA #ColdWarHistory #NavalSpyOperations🕒 Timestamps:0:00 Introduction2:15 The Soviet Spy Fleet6:30 The SOSUS Network10:45 The Trap16:00 The Rescue20:00 The Aftermath28:00 Lessons & Legacy