What is the function of a kill switch on a boat?

The function of a kill switch, commonly referred to as an engine cutoff switch, is primarily designed to enhance safety while operating a boat. When activated, it ensures that if the operator falls overboard or is otherwise separated from the helm, the engine will automatically shut off. This prevents the boat from continuing to operate unexpectedly, which could lead to serious accidents or injuries.

In the context of boating safety, the kill switch serves a crucial role by mitigating risks associated with losing control of the vessel. By design, it is typically attached to the operator via a lanyard, which detaches and activates the switch if the operator is thrown from the boat. Thus, its primary purpose directly aligns with protecting the safety of those onboard and preventing dangerous situations.

The other functions listed, such as starting the engine, powering equipment like GPS and navigation lights, or signaling to other boats, do not reflect the primary intent or purpose of the kill switch. These functions are managed by different systems and controls onboard.