That could be possible. When I logged out in my boat, I was parallel to the shore. I wasn't sure if it would drift, so I parked nearly onshore. I'm still too nervous to try leaving it out when I log, but I'll test it deeper waters. I'm sure that I was in control of the boat when I logged out, so I think that's part of the problem. I started building a ship and logged out while it was in Build Mode and everything has been fine, but I haven't tested logging out while using one...