in liner siipping, there are many documents used for different purposes. A 1 is issued by the shipper to the carrier requesting allocation of shipping space. A 2 is a document issued by carrier to acknowledge receipt of cargo at the carrier's shipping terminal and the B/L will be issurd by carrier based on information in it. A 3 is the replacement of the traditional ocean B/L and it is a non-negotiable document. A 4 provides information regarding cargo on board and is prepared by the carrier's agent. A 5 is issued by the carrier or its agent to enable the consignee or its forwarding agent to take delivery of the cargo.