I have trying to work out the logic behind how soviet submarines got assigned there names. Here is an example. First post ww2 sub class was Zulu, Z then Whiskey W, then Quebec Q and so on. I cant see the sequence Granted the examples I have given are conventional powered however if you come at it the other way then the next class after the Zulu class should have been Alpha however the Alpha class came some 25 years later. So what was the logic behind the naming?