Cryptonym: AEOCEAN
Joan Mellen, "Who Was Lee Harvey Oswald?" (2008) http://www.maryferrell.org/pages/Essay_-_Who_Was_Lee_Harvey_Oswald.html
"(CIA officer Thomas B.) Casasin was looking for links between Soviet women marrying foreigners and the KGB. Casasin also refers in his 25 November 1963 memo to a program called AEOCEAN 3, then run out of SR10, and referring to Oswald in particular: this was the legal travelers program, i. e. the intelligence use of legal travelers to the Soviet Union. It seems apparent that Casasin, a pseudonym, was not in the loop, and is struggling to make sense of Oswald and his defection.
104-10061-10115: LIST OF NAMES RE KENNEDY ASSASSINATION INVESTIGATION
()OCEAN is found on this sheet - two pages later a definition is provided to the HSCA staffers from the CIA: "people traveling legally or planning travel to the USSR (FI)."
11/25/63 memo from officer Thomas B. Casasin (pseudo) to Walter P. Haltigan: During the time of Oswald's stay in the USSR, Casasin was "increasingly interested in watching a pattern that we had discovered in the course of our bio and research work in (SR) 6: the number of Soviet women marrying foreigners, being permitted to leave the USSR, then eventually divorcing their spouses and settling down abroad without returning "home". The () OCEAN 3 case was among the first of these, and we eventually turned up something like two dozen similar cases. We established links among some of these women and the KGB. KUDESK became interested in the developing trend we had come across. It was partly out of curiosity to learn if Oswald's wife would eventually accompany him to our country, partly out of interest in Oswald's own experiences in the USSR, that we showed operational intelligence interest in the Harvey story."