The deck of a container ship
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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.