NSPS-THSOA Certified Hydrographer (CH)

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Which four-beam Janus transducer configuration is most commonly used in ADCP instruments to resolve three-dimensional velocity components?

Beams angled at 20° from vertical in opposing pairs Beams angled at 45° and directed horizontally Two vertical beams and two horizontal beams A single rotating beam at 30° tilt

Correct Answer:

Beams angled at 20° from vertical in opposing pairs

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