Brian Latell, Castro's Secrets, p. 84
A fast and secure "wireless telegraphy" for agents to send and receive ciphered messages. "A one way voice link known as OWVL is used over standard shortwave frequencies. It relies on the transmission of a series of seemingly random numbers. The numerical 'soup' could be deciphered only if the agent on the receiving end had a one-time pad corresponding to one used by the CIA sender."
AMSWEEP was described as a "FI operation concerned with the collection of Cuban military and political information via SW and OWVL."
March 10, 1966 - information passed about AMLASH-1 at the time of his arrest: "Would appreciate the use of AMOOZE-1 and AMCOMET-1 OWVL channels". Both AMOOZE-1 and AMCOMET-1 were double agents.