Is the sea waybill the same as the sea bill of lading? If not, what is the function of ocean bill of lading?

There are two kinds of bills of lading: ocean bill of lading, also called ocean bill of lading or shipowner's bill of lading, that is, the bill of lading issued by the shipowner (M B/L). This is the bill of lading issued by the actual carrier. You need to use this bill of lading to pick up the goods at the destination port before you can mention the goods of the shipping company.

Another kind of bill of lading is freight forwarding bill of lading, also known as freight forwarding bill of lading (H B/L), which is issued by NVOCC. Ordinary guests need to take this bill of lading to the freight forwarding office at the destination port to handle the original master order before they can pick up the goods. Here you have to understand that the sea waybill you mentioned is actually the same as the sea waybill.

Ocean bill of lading corresponds to air bill of lading and railway bill of lading, and distinguishes different modes of transportation.