Tsar Bomba C), north of the Arctic Circle over the Novaya Zemlya archipelago in the Arctic Ocean. The bomb was dropped from an altitude of ; it was designed to detonate at a height of over the land surface ( above sea level) by barometric sensors. The original, November 1961, United States Atomic Energy Commission estimate of the yield was 55–60 megatons, but since 1992, all Russian sources have stated its yield as 58.6 megatons. First secretary Khrushchev warned in a filmed speech to the Supreme Soviet of the existence of a 100-megaton bomb (technically the design was capable of this yield.)
Belushya Guba as an anchorage by Russian convoys between the Barents Sea and Archangelsk. A Soviet naval base was established in Belushya Guba in 1944. The settlement started to flourish in 1954, when Novaya Zemlya became established as a nuclear test site. In 1956, the whole indigenous population of Novaya Zemlya, mostly Nenets, were resettled from the islands. Belushya Guba is located in a deep bay with the same name, within a geographical area that is influenced by warm ocean currents. The natural conditions allow year-round sailing of all types and classes of vessels with minimal cost for icebreaking support. The bay