1. An operating ability monitoring system comprising: a person-dependent acceleration sensor configured to couple with a machine operator; a telemetry unit coupled with said person-dependent acceleration sensor; a second sensor coupled with a vehicle or moving machine operated by said machine operator; an evaluation unit configured to receive acceleration values from the person-dependent acceleration sensor and, receive movement values from the second sensor coupled with said vehicle or said moving machine which represent acceleration of said vehicle or said moving machine and, compare the acceleration values from the person-dependent acceleration sensor to the acceleration values from the second sensor coupled with the vehicle or the moving machine and, derive a classification of a current operating ability state based on said compare.