Sorry if i bring this thread back to life.
I got the same issue, me and my friend was going on a cruise with our large ship. We noticed right away that something with the steering was of, but it in the end it stopped turning and it just went forward.
I remember placing a table on the ship and then trying to place a computer ontop of the table, right before we sailed away. But the computer just went through the table and the ship.. maybe it has something to do with that?
Anyway, i've uploaded the savefile folder and output log:
http://www92.zippyshare.com/v/NY55u6p8/file.html
Hope it helps
//Cheffen