FOB means that the seller completes the delivery obligation after loading the goods on board the ship at the port of shipment. FAS means that the seller completes the delivery obligation by placing the goods next to the ship designated by the buyer at the port of shipment.

Differences in responsibilities and risks: In EXW, the seller has the least responsibility. In FOB, the seller has moderate responsibility. In CIF, the seller has the greatest responsibility, not only responsible for delivery at the port of shipment, but also for freight and insurance etc..