High Quality Content by WIKIPEDIA articles! The K-152 Nerpa (Russian: К-152 «Нерпа») is a 8,140-tonne (8,010-long-ton) Project 971 Shchuka-B (NATO: Akula II) type nuclear-powered attack submarine. Construction was started in 1993, but suspended due to lack of funding. K-152 Nerpa was launched in October 2008 and entered service with the Russian Navy in late 2009. The submarine will eventually be leased to the Indian Navy in 2010 and recommissioned as the INS Chakra.