What were the nuclear weapons at the start of and throughout the cold war

Atomic bombs have been used only twice in war—both times by the United States against Japan at the end of World War II, in Hiroshima and Nagasaki. A period of nuclear proliferation followed that war, and during the Cold War, the United States and the Soviet Union vied for supremacy in a global nuclear arms race.

Explanation:

a. the astrolabe could determine the correct latitudinal location of the ship