Thanks everyone for the replies, some good info there
Really?
The main point was confirmation. Dave should not be too young to remember that notorious Panorama programme when the station commander, no less, in No 1s, stood in the ops room and gave the mission brief for a ****** operation and told the world about Sosus.
It was an excellent programme and was shown on Day 1 of the OCU Cse for many years afterwards. Anyway the other side had been pulling up the cables for years and subsequently monitoring our response. Their analysis of events no doubt assisted by the information passed to them by the
Walker family, although we didn't know that at the time.
Anyway, a short while later, I read a Soviet magazine article which had a table of different NATO sonobuoys and systems and was illustrated with the ray path plots from the SSQ41 all the way to Sosus. I don't recall if it listed the 1C but it certainly had the 24953 and CZ propagation shown.
....and I saw a similar one that gave a pretty clear picture of how we conducted "****** operations". Not far removed I suspect from how they conducted Bear F ops, but that's another story.
YS