Wait why do they call it a "viking ship", not only it was a cog, type of ship i never heard being connected to vikings but at the point of XV century viking age was long gone, it was the age of Hansa, which notably extensively used cogs - big and heavy ships made for trade.

A cog:

The page hidden behind the text "said in a statement" has a lot more information and I think is better written (but longer):

https://www.vikingeskibsmuseet.dk/en/about-us/news-and-press/press-releases/archaeologists-reveal-a-medieval-super-ship-its-the-worlds-largest-cog

It's only at 13 metres and seems to be excavated as part of construction work. I think that explains the diving gear, I don't think I'm familiar with it at all

Who wrote this piece of trash article? It is a medieval cog, it has nothing to do with Vikings. The fact that it is only 600 years old should give you a clue about this already.

"Viking artisans constructed the cog in the Netherlands around 1410 CE". Fucking facepalm.