Along the deck of a huge container ship in 30 seconds
14 October 2013 Last updated at 17:31 BST
Container ships are getting bigger and more numerous with the growth in global trade.
To demonstrate the vast sizes involved, BBC News walked along part of the deck of a 365m long vessel - and condensed the resulting film into just 30 seconds.
This particular container ship was docked at Southampton where the seabed is being lowered to allow for bigger vessels.