An apparatus is for a changing gear in a marine propulsion system. A plurality of spaced apart unset teeth is formed symmetrically along the longitudinal center plane of the body in at least one recurring cycle of teeth. The vehicle also includes equipment capable of determining a distance traveled by the vehicle. Other embodiments are described and claimed. In an embodiment, a system maintains a risk level associated with the critical job to represent whether the execution of a job preceding the critical job has a problem, and it maintains the list associated with the critical job so as to quickly identify the preceding job which may cause a delay to the critical job execution. The adhesive has a first cure temperature such that the first temperature is above the first cure temperature.