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Definition of Propwash deflection unit
1. Noun. 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. ¹
¹ Source: wiktionary.com
Lexicographical Neighbors of Propwash Deflection Unit
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