a lot of work for the dockers whose job it is to fasten the cargo as well as the twist locks on each box the containers are doubly secured so. you can see in the operator here that the containers are fixed with rods to the so-called gallery this is pure manual work and depending on how large the ships are it spites across several day. but that s not always enough huge vessels can roll dramatically in rough seas exacting tremendous centrifugal forces on stacked containers it s what may have cost the m.s.c. almost two hundred eighty that s a little fact that some containers go overboard cannot be prevented it happens again and again but the magnitude of the time was such a new ship is unusual with me. and twenty eleven the rena had to reef off new zealand it broke into and sank three months later taking with it hundreds of containers there are only rough estimates of how many steel boxes go overboard each