This term means the seller delivers when the goods pass the ship’s rail in the port of shipment. Seller must pay the
costs & freight necessary to bring the goods to the named port of destination, BUT the risk of loss or damage, as
well as any additional costs due to events occurring after the time of delivery are transferred from seller to buyer.
Seller must clear goods for export. This term can only be used for sea transport[1]

“Cost and Freight” means that the seller delivers the goods on board the vessel or procures the goods already so delivered. The risk of loss of or damage to the goods passes when the goods are on board the vessel. the seller must contract for and pay the costs and freight necessary to bring the goods to the named port of destination.[2]

Reference

[1]

[2] https://iccwbo.org/resources-for-business/incoterms-rules/incoterms-rules-2010/