Friday 13th July 2012 Operation Olympics, HMS Ocean takes her place on the River Thames in preparation for London 2012 Olympic Games security operation Stock Photo - Alamy

Download this stock image: Friday 13th July 2012 Operation Olympics, HMS Ocean takes her place on the River Thames in preparation for London 2012 Olympic Games security operation. - CMBXX9 from Alamy's library of millions of high resolution stock photos, illustrations and vectors.

London 2012 Olympics: HMS Ocean moors on the Thames for security operation

London 2012 Olympics: HMS Ocean moors on the Thames for security operation

Army security london olympics hi-res stock photography and images - Alamy

Royal Navy's largest warship sails down the Thames as armed forces put on show of strength for Olympics

Army security london olympics hi-res stock photography and images - Alamy

Commandos olympics security hi-res stock photography and images - Alamy

Army security london olympics hi-res stock photography and images - Alamy

In preparation london 2012 olympic games hi-res stock photography and images - Alamy

Army security london olympics hi-res stock photography and images - Alamy

Commandos olympics security hi-res stock photography and images - Alamy

The biggest ship in London! HMS Ocean heads up the Thames in show of strength before the Olympics (as Defence Secretary warns: 'We would shoot down a jet if necessary')

London 2012 Olympics: HMS Ocean moors on the Thames for security operation