Miscellaneous Rates transactions communicate rate information for services beyond standard transportation charges, such as demurrage, detention, and storage fees. Typically initiated by rate-setting organizations, carriers, or freight service providers, these documents are sent to customers, freight forwarders, and logistics partners who need to understand non-standard service charges. The transaction set is organized around a mandatory Docket Header (DK) segment that establishes the rate authority and context, supported by an External Reference Identifier (PRI) segment to link the rates to specific agreements or regulatory filings, and Demurrage/Detention/Storage Rate (DM) segments that detail the actual charges applicable to various service conditions.

For example, Global Port Services might send a 492 transaction to TechShip Logistics detailing new demurrage rates at their Long Beach facility. The DK segment identifies the docket authority and effective date, the PRI segment references the specific tariff filing number, and multiple DM segments within the SC Loop specify charges for different scenarios—such as $150 per day for container detention beyond the first five days and $200 per day for storage of hazardous materials. TechShip Logistics receives this rate update and loads it into their freight management system to ensure accurate billing for customers using Global Port Services’ terminals.