http://en.wikipedia.org/wiki/I-400_class_submarine
Does this have Air Independent Propulsion (AIP)?
I recently saw a documentary about the Japanese I-400 subs. Monster subs, way ahead of their time in WWII. They had an aircraft hanger inside and could deploy aircraft after surfacing. It’s a shame none survived after the U.S. scuttled them off Hawaii to keep the technology out of Russian hands. The Chinese are seventy years late on a big sub and still can’t match what the Japanese accomplished so many years ago.