The failure of the project "Ivy"
One of the most secret CIA intelligence projects of the early 1970s was the use of submarines to penetrate Soviet territorial waters, almost invading the layout of our naval bases.
Cocoon" for underwater espionage
The CIA considered the top secret project “Ivy” (“IVY BELLS”) to be the culmination of its intelligence explorations of the 1970s — picking up information from our underwater cable lines. The Americans proceeded from the fact that we, believing in the invulnerability of submarine cables, will either use simple ciphers or negotiate in clear text. To intercept the talks they used submarines. The downside was that they were forced for a long time to stand still above the cable. This, of course, threatened to decipher the operation. It was necessary to replace the submarines with a stationary device capable of working in autonomous mode and “merging” the accumulated information coming into the “turnout” submarine. As a result, such a device on the instructions of the CIA was created by NSA experts.
The device, called the "Cocoon", embodied the latest achievements of radio-electronic technologies and was able to "remove" information from the cable without opening its outer shells.
"Cocoon" was a cigar-shaped container, in the tail part of which there was a miniature nuclear reactor, which served as a power source for the onboard radio-electronic system.