A seafloor haulage system (10), for lifting seafloor materials from the seafloor to the surface, that has a line member (150), preferably synthetic rope, that extends at least partially between the seafloor and the surface and a container (400), preferably a plurality of containers, capable of carrying a load connected to the line member (150). The containers have a steerable element (410), such as a rudder, that enables the container to manoeuvre as it is propelled, typically towed by the line member, through the water.