Oboe was relatively simple in that it required two stations to transmit pulses that could be laid over a target provided the interception was a minimum of 30 degrees; but the closer the intersection was to 90 degrees, the more accurate the 'fix'. By flying along one curved range beam - transmitted by the 'Cat' station - Oboe-equipped aircraft could receive signals that told the crew if they were on-track or off-track, and they could adjust accordingly. The 'Mouse' transmitter was used to intercept the 'Cat' beam at the precise, intended point of release of the bombs. All of this could be done 'blind', irrespective of cloud cover, day or night.
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