Warship's Thames exercise
The Royal Navy's largest warship, HMS Ocean, has docked in the Thames as it prepares to take part in military exercises ahead of the Olympics.
Guiding HMS Ocean through Thames Barrier was a 'challenging' task
HMS Ocean was successfully negotiated through the Thames Barrier, before beginning a 180-degree turn at West India Docks. She arrived at Greenwich at around midday.
Captain Andrew Betton described the task of guiding her through gaps of just 60 metres as "challenging".
Smaller crafts and patrol boats accompanied the ship as part of the maritime security plan.
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HMS Ocean warship makes Olympics river journey
The Royal Navy's largest warship, HMS Ocean, sailed up the Thames today as the military stepped up security preparations for the Olympics.
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Missiles, war ship and jets move into place for Olympics
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Video shows 'unguarded missiles' outside London flats
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