Which safety feature helps to prevent accidents when the operator falls overboard?

The kill switch is a critical safety feature designed to enhance safety on the water, especially in situations where the operator might fall overboard. This device is connected to the engine of the boat and is designed to automatically shut off the engine if the operator is thrown from the boat or falls overboard. By cutting the power immediately, the kill switch helps to prevent the boat from continuing to operate in an uncontrolled manner, which could lead to collisions or further accidents.

Life jackets, while essential for ensuring the safety of individuals in the water, do not prevent accidents due to operator mishaps. A fire extinguisher is vital for handling onboard fires and navigation lights are necessary for visibility and safe navigation at night but don’t directly address the issue of an operator falling overboard. Thus, while all of these safety features play important roles in boating safety, the kill switch specifically serves to prevent further accidents by stopping the boat's operation if the operator is no longer in control.