Quote:
Originally Posted by Jenson71
A History channel website says they could be under water for about 2 hours. That blows my mind. I honestly thought they were roaming around for about as long as their food/ammunition supplies could last.
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That was more WWI era when the battery technology was less advanced. WWII era was more like a day submerged but they were slow when underwater. I also seem to recall reading something about surface firing of torpedoes being more accurate.