| 41. | In the words of Alan Hotham, British Director of Naval Intelligence, ASDIC was a " huge bluff ".
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| 42. | The effectiveness of early ASDIC was hamstrung by the use of the depth charge as an anti-submarine weapon.
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| 43. | The confidential papers were consigned to the sea bed, and the Asdics were destroyed and the pieces thrown overboard.
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| 44. | Best of luck " and " Safety of personnel would be your first consideration after destruction of the Asdics ".
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| 45. | Throughout 1935 and 1936, D�nitz had misgivings regarding submarines due to German overestimation of the capabilities of British ASDIC intelligence.
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| 46. | Developments during the war resulted in British ASDIC sets which used several different shapes of beam, continuously covering blind spots.
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| 47. | The U-boat anechoic tile rubber coating, one layer of which contained circular air pockets to defeat ASDIC sonar.
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| 48. | The first passive sonar hydrophones were introduced into the RN in 1914 while ASDIC ( active sonar ) came in afterwards.
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| 49. | At 0406 " Vidette " made an ASDIC contact at, and made a hedgehog attack causing two explosions.
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| 50. | This time he was involved in ASDIC ( Anti-Submarine Detection Investigation Committee ) which is known today as sonar.
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