Question 326General Subjects - Assistant Engineer

The correct answer is A) Cycloidal propellers. Cycloidal propellers, also known as Voith-Schneider propellers, are a type of steerable propulsor that does not require a separate rudder for steering. This is because the cycloidal propeller blades can be rotated around a vertical axis, allowing the thrust to be directed in any horizontal direction, providing excellent maneuverability without the need for a separate rudder. The other options, such as contra-rotating propellers, tandem propellers, and conventional fixed-pitch propellers, do require a separate rudder for steerage.