Originally posted by Nascarman:

I’ve never seen a boat capsize due to waves. Are you sure you didn’t ram it into the leviathan? I’m pretty sure they’ll never allow building on a leviathan since it’s an entity and moves, so that’s not the solution to your problem.

As I wrote, I got too near to the leviathan: waves was nearly covering it so, in the storm, I didn't see my boat overlapped his shell: when waves went down, the karve hit the leviathan and, being a short light boat, falling down to the sea capsized: if I had a drakkar it probably just landed back in the sea, a karve can capsize, instead.

All apart, technically I don't want to "build on a leviathan": being able to place down a workbench, even if it breaks after minutes, is far more than enough, to me.
If I build anything over the beast and it moves, making my castle (LOL) to crumble in the sea, seems correct to me.