<P> In 1938 the British Balloon Command was established to protect cities and key targets such as industrial areas , ports and harbours . Balloons were intended to defend against dive bombers flying at heights up to 5,000 feet ( 1,500 m ) , forcing them to fly higher and into the range of concentrated anti-aircraft fire -- anti-aircraft guns could not traverse fast enough to attack aircraft flying at low altitude and high speed . By the middle of 1940 there were 1,400 balloons , a third of them over the London area . </P>
<P> In 1938 the British Balloon Command was established to protect cities and key targets such as industrial areas , ports and harbours . Balloons were intended to defend against dive bombers flying at heights up to 5,000 feet ( 1,500 m ) , forcing them to fly higher and into the range of concentrated anti-aircraft fire -- anti-aircraft guns could not traverse fast enough to attack aircraft flying at low altitude and high speed . By the middle of 1940 there were 1,400 balloons , a third of them over the London area . </P>
what were the blimps used for in ww2 in london
what were the blimps used for in ww2 in london
to defend against dive bombers flying at heights up to 5,000 feet ( 1,500 m )
to defend against dive bombers flying at heights up to 5,000 feet ( 1,500 m )