He was debriefed by KGB officer Vitaly Yurchenko and disclosed Operation Ivy Bells, an NSA and United States Navy program to surreptitiously wiretap undersea cables to monitor Soviet military communications and track Soviet submarines.
During the Cold War, the Sea of Okhotsk was the scene of several successful U.S. Navy operations (including Operation Ivy Bells) to tap Soviet Navy undersea communications cables.
Operation Overlord | Operation Enduring Freedom | Operation Barbarossa | Organization for Security and Co-operation in Europe | Ivy League | Operation Market Garden | Organisation for Economic Co-operation and Development | Operation Torch | Operation Vistula | operation | Jingle Bells | Ivy Queen | Ivy | Operation Provide Comfort | Operation Anaconda | Tubular Bells | Police and Judicial Co-operation in Criminal Matters | Operation Weserübung | Operation Shingle | Operation Ivy | Operation Highjump | Operation Blue Star | Operation Anthropoid | Operation Paperclip | Operation Downfall | Operation Deny Flight | Poison Ivy | Operation Thunderbolt | Operation Southern Watch | Operation Michael |