Tracking while at sea

Sorry if this info is in the archives somewhere, but I haven't been able to find it after hours of searching here and at YG. I recall reading a while back that some folk were able to track the shipment of their cars while onboard ship en route to the states. Does anyone remember this thread and can you point me in the proper direction?

I have what I believe to be a vessel name and the ship date as well as a VIN, but can't locate the info on how to actually track the status of the shipment.

TIA for any help.

146 days and counting,

Matt