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