Which safety device can prevent a person from falling overboard?

The kill switch or lanyard is designed to enhance safety by automatically shutting off the boat's engine if the operator is thrown overboard. This feature stops the propeller from spinning, which is crucial because an operating boat can pose a significant risk to anyone in the water. By ensuring the engine stops, the kill switch minimizes the chances of further injury and makes it safer for others to assist a person who has fallen overboard.

In contrast, while life jackets are essential for buoyancy and preventing drowning, they do not actively prevent someone from falling overboard. Fenders serve to protect the boat from damage when moored or docking but do not provide any safety to individuals. An anchor's primary function is to hold the boat in place; it does not contribute to preventing falls. The kill switch is the only option specifically aimed at maintaining the safety of individuals on board in the event of a fall.