Interesting read on the mini-submarine. I don't know if you saw it, but we posted an essay on 7 Dec. 1999 over at Warships1.com's Tech Board which also debunked that Naval History article.
I'm new to this board, I was really just looking around for additional information on St. Louis's sub contact since that seems to be the "missing" one in both the NavHist article and the June issue of National Geographic as neither article mentions that submarine at all. I see that you cover that particular one quite well in your post on this subject.
You mention Walter Lord's book. In his book, there's another good picture, possibly taken by the same Japanese aircraft that took the one "showing" the mini-submarine, that is a direct overhead view of Battleship Row after the attack began but before Arizona was destroyed. I call this to your attention as it seems to be obvious from this photograph that under water visibility was poor, even from directly overhead, which would imply that you couldn't see the mini-submarine from this viewpoint, let alone from a large angle as in the photograph used by NavHist article's authors.
My apologies, but I just noticed that this board prefers the use of proper names. I'm Tony DiGiulian, I will delete my current profile for this board and create a new one using my full name. I'm so used to using just "Tony D" over at our own message boards that I just naturally use it everywhere else.
(Edited by Tony D at 82 am on June 5, 2001)