| 1. | For ASW operations, she uses Chinese SJD-3 telescoping high frequency active sonar.
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| 2. | With the development of active sonar, depth control became even more complex.
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| 3. | Active sonar emits an acoustic signal, or pulse of sound, into the water.
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| 4. | Consequently, active sonar is normally considered a backup to passive sonar.
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| 5. | In 2013, research showed beaked whales were highly sensitive to mid-frequency active sonar.
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| 6. | In active sonar there are two performance limitations, due to noise and reverberation.
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| 7. | Active sonar searches use a sound wave to detect the hulls of surface vessels.
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| 8. | Active sonar can also be used as a deterrent and / or disablement mechanism.
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| 9. | Echolocation is the same as active sonar, using sounds made by the animal itself.
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| 10. | This is a sonar designed to detect and locate the transmissions from hostile active sonars.
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