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 spiked across several days. 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. almost two hundred eighty. some containers go overboard cannot be prevented it happens again and again but the market should have less time with such a new ship is unusual. in twenty eleven the rena had to reef new zealand broken two and sank three months later taking with it hundreds of containers their only rough estimates of how many steel boxes go overboard each year between fifteen hundred and ten thousand c. ex-pats out of a total of some one hundred thirty million shipments a year but every single dangerous goods container that gets lost is