After talking to our driver who came for our container about losing it at sea, he told us there wasn't anything to worry about as all household goods are on the bottom, and the ones that are upstairs are foodstuffs and such like, but should your container arrive late at the port it goes on top. He also stated that there are plenty of containers that are just tossed overboard if the journey gets a little rough.
They should have ditched ours as we could have claimed for total loss, instead of arguing with the insurance company about a mouldy 3 piece suite and a knackered computer.
Kim