So we have at least 4 pics which apparently show the dump containers -I didnt think they looked like that-but when they are in position over the ships holds ,they reportedly open the bottom to allow the ore to dump out-cant even see any top on the ones in the pics- just open the tailgate doors at one end I guess-and if no top need careful movement w cranes I would think. Here the 2 cables which were attached to the dump door are detached from the container since the load has been dumped.