Originally posted by Zep Tepi:

This is very strange because they aren't supposed to move if no one is in them, unless something hits them from the outside. You should be able to park it near shore even in a storm without it changing position, and I've done so more than once. However you can swim next to one and push it around that way. Was it bumping into something? Was there a mob nearby messing with it?

Drifting while you are in it does happen, but that would stop the moment you jump out.

Hmm. Well it definitely moved the most when I was actually in it so that rings true for the most part. They were really big waves (my rather large dockhouse was 80% under water during the peaks when its above the water in calm seas) so I might have thought it initially moved simply because it was at a different point in the wave when I came back to it and it had hit land or something.

But yeah it was the most noticeable while I was managing my inventory space inside the ship. I zoomed back out and thought "Whoa I'm pretty far away from the dock platform now! I'm glad I am in the boat so I can sail back!"

I'm used to this game throwing the unexpected at me so I guess I made an assumption that might not be true lol. I'm glad to know that it shouldn't happen so I won't need to be as detailed about docking in the future.

I'll try and remember to keep track of whether it moves when I'm not in it (and no enemies or it hitting something etc). It was the first such experience I had as all of the other times I jumped off it was where I left it - even when there were big storms while I was at my base.

I remember thinking that maybe it was a black forest dock sort of thing as all of my other docks are in meadows biomes.

I also built this dock farther out in the water than my other ones because of the potential for troll attacks.