According to the FOB the seller must deliver the goods on board, however, they cannot put the container on the vessel, so they have to deliver it to the CYcontainer yard or to the CFScontainer freight station. The examination and counts between the two sides and customs clearance are done in CY or CFS. This means that the seller has actually delivered the goods at CY CFS but is still responsible for the cargo risk until the goods are loaded onto the vessel.