A submarine
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Russia launches 'stealth' submarine in St Petersburg

29 November 2013 Last updated at 15:36 GMT

Russia has launched a new submarine in St Petersburg - the first in a series of six to be delivered to the Russian Black Sea fleet over the next two years.

The diesel-electric submarine Novorossiysk is the latest example of non-atomic technology. It is well armed and hard to detect when submerged.