"If you are planning to get to the boat by swimming, then you should not take too many heavy things with you, because you can lose them. Don't try to swim with a crowbar in your hands!"

What happens to the items? Do they go on the shore or are they gone forever? What defines "too many heavy items"? Can you not swim with things on your belt/holster/hands? More info on this would be nice as this happened to us on our server.

Also can we get a submod to remove pontoons and build wooden floors as normal?

EDIT: I just saw the swimming video, it would have been nice if that information was in the description. Store things in backpacks, especially paper, and don't be encumbered at all. Equipped things will stay on you. I assume items are lost forever.