A single-screw vessel going ahead tends to turn more rapidly to port because of propeller __________.

Correct Answer: Option C — sidewise force

Sidewise force, or transverse thrust, is the primary factor causing a single-screw vessel to turn more rapidly to port when going ahead. The rotation of a right-handed propeller creates a lateral pressure differential that pushes the stern to starboard, effectively pivoting the bow to port during initial movement.