Are there any academic institutions operating on bodies of water? Are there any (accredited/recognized) academic institutions with a significant part of their activities - administrative and academic - held over a body of water (sea, lake or river), on some floating platform?



The kind of platform could be boat or a barge; or if that doesn't exist,
then at least - buildings built directly on struts in the water without solid foundations (a-la Tolkien's Esgaroth, or Lake-town).

Notes:


Universities which have ships and/or operate ships and/or hold some classes on ships and/or send students out on trips on ships - don't count. The univesity or institute has to operate primarily on the barge/ship/floating platform.
Bonus points if it's a proper university and if what they teach is not just shipping/marine-related.
I don't want a recommendation of such institutions, nor a list of them, I just want to know if any exist.
The Semester At Sea program is an established and respected program run by the The Institute for Shipboard Education, which I think only does this Semester at Sea program, and Colorado State University, which obviously has a lot of land based activities. The program offers a range of classes, but does not offer a degree (as far as I can tell).