Question 154General Subjects - 1st Asst/Chief

The correct answer is C) Cycloidal propeller. The Voith-Schneider drive, also known as a cycloidal propeller, is a type of marine propulsion system that uses a series of vertically mounted blades arranged in a circular pattern to provide thrust. These blades can be individually rotated to change the direction of thrust, allowing for excellent maneuverability. The cycloidal propeller is the proper terminology for this propulsion type, as it accurately describes the mechanism of the Voith-Schneider drive. The other options are incorrect because they do not accurately represent the Voith-Schneider drive. Tandem propellers refer to two propellers mounted in series, ducted propellers have a shroud or duct surrounding the propeller, and a vane wheel is a separate type of marine propulsor.