| 21. | In addition, RCN vessels were incapable of operating gyrocompasses, making ASDIC attacks more difficult.
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| 22. | The escorts made an asdic contact on 2 May, which the destroyer and minesweeper attacked.
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| 23. | Submarines were slow while submerged, and ASDIC sets did not operate effectively at speeds of over.
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| 24. | Her anti-submarine features included ASDIC, a hydrophone, and four depth-charge throwers.
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| 25. | ASDIC Type 144 was carried for search and attack functions with Type 147B used for depth finding.
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| 26. | She spent some time as an ASDIC training target, then was put into reserve at Londonderry.
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| 27. | She was subsequently sunk as an ASDIC target off the Isle of Wight on 29 July 1959.
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| 28. | Anti-submarine sensors included sonar ( or ASDIC ), although training in their use was indifferent.
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| 29. | The ships are equipped with VDS ( Variable Depth Sonar ), formerly known as dipping asdic ."
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| 30. | In April 1963 she collided with a wharf when docking in Brisbane, damaging her ASDIC sonar equipment.
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