100.01 Duty of Common Carrier to Passenger At the time of the occurrence in question, the defendant, [name of carrier], was a common carrier. A common carrier is not a guarantor of its passengers' safety, but it has a duty to its passengers to use the highest degree of care consistent with the mode of conveyance used and the practical operation of its business as a common carrier by [rail, air, etc.]. Its failure to fulfill this duty is negligence.