Alrosa 871 Kilo class submarine with experimental pump-jet in 2008.
Did I ever read Tom Clancy's The Hunt For Red October? I think I did. I for sure saw the movie. Remember the caterpillar drive? People are always trying to come up with new, different and better ways of doing something. This picture is the first evidence I have seen that anyone actually tried an alternate method of propelling a full size submarine.