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propwash deflection unit. In DICTIOUS you will not only get to know all the dictionary meanings for the word
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English
Noun
propwash deflection unit (plural propwash deflection units)
- A device that is placed over or behind the propeller of a boat to deflect the vessel's propwash downward. The result is a very effective form of agitation dredging. PDUs are primarily used by salvors to remove mud or sand from shallow water shipwrecks.
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