My calculations and research indicate the ships leave SA bound for US once a month. The last few left on/around the 17th and then arrived the first week of the next month. With the BMW tracking system being a few days behind, we should know by the end of the week if we are on a boat.
Since I sold my current ride and will be car-less as of Friday, I hope this holds true.
'11 335i xdrive Performance Edition BSM/Black