And the "Dreadnought" subsim arms race is on!
Next up;
the YamaIowaDreadPT Superbattleship which launches it's own counter-submarine-submarine. The entire hull is surrounded by a subnet. Top speed is 2 knots and it rolls 360 when firing it's broadside.
Not to be outdone the Air Force will come up with a PBY with turrets and droppable single-man suicide mini-subs.
