The Kilo class is the NATO reporting name for a naval diesel-electric submarine that is made in Russia. The boats are mainly intended for anti-shipping and anti-submarine operations in relatively shallow waters. The first submarine entered service in the Soviet Navy in 1980, and the class remains in use with the Russian navy. 17 vessels are believed to still be in active service with the Russian Navy, while 7 vessels are thought to be in reserve. So far, 33 vessels have been exported to several countries.