Don't worry, if the controller stops working you just get everyone to lean to one side and that'll get rid of the scrap metal they use for ballast:
Quote:
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“Some of the ballast is abandoned construction pipes that are sitting on shelves on the side of the thing, and the way you detach the ballast is you get everybody on board to lean into one side of the sub and they roll off.”
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https://www.washingtonpost.com/world...angate-vessel/