The W89 200 kiloton (0.2 MT) warhead armed both the tactical Sea Lance area effect anti-submarine weapon for use far out at sea and the strategic bomber launched SRAM II stand off missile designed for use in the Soviet Union's interior. The strategic attacks on Hiroshima and Nagasaki utilized weapons of between 10 and 20 kilotons, but that was because the "Little Boy" and "Fat Man" bombs were the most destructive and only nuclear weapons then available.
The W89 200 kiloton (0.2 MT) warhead equipped both the tactical Sea Lance area effect anti-submarine weapon for use at sea and the strategic bomber launched SRAM II stand-off missile designed for use in the Soviet Union's interior. Strategic attacks on Hiroshima and Nagasaki utilized nuclear weapons of between 10 and 20 kilotons, primarily due to the limited availability of more destructive 