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Originally Posted by Kyt  One must remember that the question of radio-silence etc wasn't the same for fighters. The fighters were going up specifically to fight other fighetrs/bombers. The bombers had to try to keep radio-silence as long as possible so that they could not be located. |
One of the many ways the germans found to warn of forthcoming raids, was the fact that bombers used to test their HF radios before takeoff. That gave an indication of the amount.