Definition

Noun

  • (AKA ducted propeller) A cylindrical fitting around the propeller.

Origin

Early 20th century. Named after German engineer, Ludwig Kort.

Comments

Provides more efficient and powerful thrust for a vessel moving under ~10 knots. Thus, it’s useful for tug boats, fishing trawlers, or vessels that need good maneuverability at low speeds. The shape and design of the nozzle itself also has effects of maneuverability.

References

Rogers, J.G. (1985). Origins of Sea Terms. Mystic, CT: Mystic Seaport Museum.

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