Divers are exploring a remarkably well-preserved 15th-century shipwreck off Häringe, in Sweden's Stockholm archipelago. The vessel is believed to be the oldest medieval warship found in Swedish waters and could offer new insights into Scandinavian shipbuilding.
The ship was built using the carvel technique, in which planks are laid edge to edge to create a smooth hull. Researchers say it is the first known example of a ship built this way in Sweden or Denmark.
