The Japanese torpedoed the Yanmar (it was carrying a load of lumber ) in Appalachicola Bay FL during WW II. It sank.
If the weight of the vessel is more than the volume it displaces in the fluid or gas it is floating in it will sink.
Summary: I guess I don't have a clue as to what a "vessel sink" is. Kitchen sink, laundry sink, heat sink I understand. I have seen laundry tubs, buckets, and water troughs made of wood, but have never made one myself.
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