Abstract: A logistics system for the collection and delivery of ocean freight which includes a carrying vessel adapted to hold a plurality of barge-like cargo modules individually suited for the carriage of containers or autos or liquid or dry bulk or deck cargo. Rather than berth at the ports served in its deployment, the carrying vessel anchors in close proximity to the origin or destination port, and floats off inbound barge modules which are immediately replaced by outbound barge modules, similarly floated on. Therefore, in a short period of time, the carrying vessel can exchange its entire cargo capacity. Harbor tugs ferry the barge-like cargo modules to and from a plurality of marine terminals for stevedoring operations. Meanwhile, the newly loaded carrying vessel is already on its way to its next port of call.