| 1. | It was here that he invented the Towed Asdic Repeater Target.
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| 2. | And " Scarborough " was not fitted with asdic.
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| 3. | Surface ships usually used ASDIC ( sonar ) to detect submerged submarines.
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| 4. | This was actually a recording of a jet aircraft at naval ASDIC.
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| 5. | By the beginning of April 1940, the Asdic equipment.
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| 6. | The establishment was largely involved in ASDIC and sonar development.
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| 7. | In reality, ASDIC could detect only one submarine in 10 during exercises.
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| 8. | Among the propeller noises and asdic pings was a new, unknown sound.
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| 9. | She left Norway equipped with six contact and eight ASDIC ( Sonar ) pinging.
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| 10. | On 27 January she had her ASDIC ( sonar ) equipment repaired at Malta.
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