The Special Control Service (SCS, direct English transliteration – SSK) is an autonomous intelligence organization within the main structure of the 12th Chief Directorate of the Ministry of Defence (Russia), and previously of the Ministry of Defence of the USSR. It is also known as a “v/ch 46179”, or “the Special Control Service of the Defense Ministry”, (in Russian: “Служба Специального Контроля Министерства Обороны” or, shortly, “Служба Спец. Контроля МО”, or “CCK” – in English transliteration – “SSK”, or by its coded Military Unit Number 46179 (v/ch 46179). Sometimes it is also referred to as “atomic intelligence” or “nuclear intelligence” of the Russian Ministry of Defense.