propwash deflection unit

English

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.

https://web.archive.org/web/20060929134832/http://www.fknms.nos.noaa.gov/regs/fmp2.pdf
http://www.shipwrecks.com/ethics_in_underwater_archaeology.htm

单词	propwash deflection unit
释义	propwash deflection unit 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. Synonyms deflector PDU References https://web.archive.org/web/20060929134832/http://www.fknms.nos.noaa.gov/regs/fmp2.pdf http://www.shipwrecks.com/ethics_in_underwater_archaeology.htm
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