What's the largest homebuilt sub in the world?  That nicely styled and full-featured Kraka, based in Copenhagen?  Well yes, she's the largest operational homebuilt that I know of.  But her builder Peter Madsen has been working on his next project...

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I just received a note and photos from Mark Smith of Hamilton, Alabama about his wet sub project.   Mark is an experienced diver and long time undersea enthusiast, and he's tackled an ambitious wet sub project.