The U212A is an ultra-advanced non-nuclear sub developed for the German Navy.Powered by a revolutionary hydrogen fuel cell, it is almost totally silent.Without the need for combustible fuel, the sub can remain submerged for weeks at time.CNN's global series i-List takes you to a different country each month. In February, we visit Germany and look at changes shaping the country's economy, culture and social fabric.
Eckernfoerde, Germany (CNN) -- It is almost totally silent, radiates virtually no heat and is constructed entirely from non-magnetic metals.
