If an operator falls overboard, what can keep him or her from being the victim of a propeller strike?

The correct answer is related to the function of the engine cut-off switch lanyard. When a boat operator falls overboard, the engine cut-off switch lanyard is designed to automatically shut off the engine if the operator becomes disconnected from the control. This safety feature is vital because it prevents the propeller from continuing to run, which significantly reduces the risk of injury from a potential propeller strike.

While a life jacket, whistle, and flotation device are all important safety items for boating, they do not directly prevent the danger of a propeller strike in the event of an operator falling overboard. A life jacket provides buoyancy and keeps the person afloat; a whistle can signal for help; and a flotation device assists with staying afloat, but none of these can stop the engine from running. Therefore, in the context of preventing harm from a moving propeller, the engine cut-off switch lanyard is a critical safety feature.