🔍 Key Concepts

• A Kort nozzle is a ring-shaped shroud that surrounds the propeller to improve thrust, especially on tugs and towboats. • On profile drawings, the Kort nozzle is usually shown low on the hull near the stern, around the propeller area. • Distinguish between the rudder, the propeller, and any cylindrical housing around the propeller.

💭 Think About

• Look at the stern (after end) of the towboat in the illustration: which label is pointing to a circular or tube-like structure around the propeller? • Which labels are pointing only to flat steering surfaces or the bare propeller blades, and which label is pointing to something that encloses the propeller? • Ask yourself: if you removed the propeller, which remaining part would still look like a ring-shaped duct providing a channel for water flow?

✅ Before You Answer

• Verify which letter indicates a ring or duct rather than a blade or flat plate. • Confirm that the chosen part is located at the stern, below the waterline, in the propulsion area. • Make sure you are not picking the rudder or propeller itself, but the housing that surrounds the propeller.