Close inspection of the shipwreck explored during Dive 02 of Windows to the Deep 2021 showed that the seams along the hull lacked rivets and were welded together, which is consistent with the construction of mid-1940s tankers like SS Bloody Marsh.
Welded Seams
Image courtesy of NOAA Ocean Exploration, Windows to the Deep 2021.
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Close inspection of the shipwreck explored during Dive 02 of Windows to the Deep 2021 showed that the seams along the hull lacked rivets and were welded together, which is consistent with the construction of mid-1940s tankers like SS Bloody Marsh.

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