Some food for thought, contrary to popular belief RN asdic was capable of a full 360 degree traverse and it was standard practice for the operator to swing the transducer astern and attempt to re-acquire the target as the ship passed over the target during the attack run. The transducer was also slaved to the ships gyro compass and at the flick of a switch the operator could engage the system so that the asdic head would stay on the target bearing regardless of own ship manoeuvering.
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