Hero Kim Kun Ok

Hero Kim Kun Ok (Korean: 김군옥영웅함) or Tactical Nuclear Attack Submarine No. 841, is a Sinpo-C-class submarine operated by the Korean People's Navy. It is a modification of the Romeo-class submarine, of which 20 are under operation by North Korea. The "nuclear" in its designation refers to its projected armament; it is diesel-, not nuclear-powered.