Arms trade/ Air-independent (closed cycle)
submarines
'The Russian side is ready to supply a foreign client with a submarine
refitted to meet any requests for a different exterior and equipment as
formulated by the client,' the source told RIA Novosti.
In 2007, New Delhi said it was considering expanding its fleet of
submarines with diesel-electric subs. One of the key requirements was for the
boats to have so-called anaerobic engines.
Air-independent (closed cycle) submarines, which usually use
hydrogen-oxygen fuel cells, are quieter than conventional diesel-electric boats
and do not have to surface or use snorkel tubes to breathe air, thereby
exposing themselves to detection by radar and other sensors.
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