A gravity bomb is an
aircraft-delivered
bomb that does not contain a
guidance system and hence, simply follows a
ballistic trajectory.This described all aircraft bombs until the latter half of
World War II and the vast majority until the late 1980s.Then, with the dramatically increased use of
precision guided munitions, a new term was needed to separate 'smart bombs' from those that weren't. Dumb bomb was used for a time, but many in military circles felt it sounded too trite, and eventually 'gravity bomb' gained currency. Previously they were also referred to as Iron bombs.
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