Answer:
To turn the engine off in a situation of pilot of person overboard.
Step-by-step explanation:
Various safety laws have been implemented to prevent damage due to boats in case the person driving the boat goes overboard i.e. falls off the boat. One of these mandates the use of lanyard type cutoff switch with the lanyard tied to the wrist or clothes of the person driving the boat. In case the person goes overboard the engine will be cutoff as the lanyard will pull along the cutoff switch as well.