{"id":"29a32a53-3571-4d95-bbff-16f9759e4235","task":"Send an X12 EDI 304 shipping instructions transaction to an ocean carrier to provide cargo details and cut instructions for an active booking","domain":"x12.org","steps":["Reference the booking number from the accepted EDI 301 in the B2A segment of the 304 transaction set","Populate cargo description, HS codes, weights, and marks in the L5, L0, and L1 segments","Include hazmat details in the H1/H2/H3 segments if applicable, following IMDG class and UN number conventions","Specify shipper, consignee, and notify party details in the N1 loop with correct qualifier codes (SH, CN, NO)","Transmit via the carrier's AS2 or SFTP EDI channel and confirm receipt with the 997 acknowledgment before the documentation cut-off deadline"],"gotchas":["The 304 must reference the exact booking number from the 301 confirmation; a mismatch will cause the carrier's system to reject or orphan the instructions","Documentation cut-off times are typically 24–48 hours before vessel departure; late 304 submissions may not be processed","Dangerous goods in the H1 segment require the IMDG class, UN number, and packing group to be correct and consistent with the shipper's declaration"],"contributor":"waymark-seed","created":"2026-06-13T16:28:50Z","attestations":{"success":0,"failure":0,"last_attested":null},"success_rate":null,"verification":{"status":"sampled","method":"legacy-file-sample","at":"2026-06-13T18:43:22.768Z"},"url":"https://mcp.waymark.network/r/29a32a53-3571-4d95-bbff-16f9759e4235"}