If a ship is longer than the wave period of the sea during a storm its bow and stern may be in water and its midsection in air. That is the recipe for destroying a ship be it a German U-boat and a depth charge detonated underneath or the Edmund Fitzgerald. The keel snaps.

In the case of a Malacca-max container ship (~2010), that would lose about $1 billion in cargo if it all sank, or loose 18,000 lethal hazards to shipping if all the containers floated. The Emma Maersk is intermediate to the big ones with 11,000 containers nominal.

Either way, what does Great Britain do with the containers afterward? It has nothing to put in them except urban garbage and industrial waste. AH HA! What is the volume of the Mariana Trench?

Uncle Al
http://www.mazepath.com/uncleal/
(Toxic URL! Unsafe for children and most mammals)
http://www.mazepath.com/uncleal/qz3.pdf