You are on a single-screw vessel with a left-handed propeller making no way in the water. How will your vessel react when you apply right rudder?

Correct Answer: Option A — Rudder alone has no effect on the vessel

Rudder effectiveness is entirely dependent on the flow of water across the rudder blade. When a vessel is dead in the water with no headway or sternway, there is no water flow over the rudder, rendering it ineffective for steering or turning the vessel until propulsion is engaged.