1. A utility vehicle, in particular a firefighting vehicle ( 10 ), comprising an aerial apparatus like a turnable ladder ( 12 ) and/or an aerial rescue platform and lateral ground supports ( 16 ) that are movable between retracted positions and extracted operating positions in which the ends of the supports ( 16 ) rest on the ground, characterized by a monitoring system ( 28 ) for monitoring the position of the vehicle ( 10 ), comprising: surveillance cameras ( 22 ) at the sides of the vehicle ( 10 ), each camera ( 22 ) being allocated to one support ( 16 ) to monitor the ground area ( 24 ) on which the end ( 20 ) of this support ( 16 ) rests in its operating position and to take a real-time image ( 32 ) of the respective ground area ( 24 ), and a visual display ( 30 ) presenting the images ( 32 ) of all cameras ( 22 ) at the same time in different screen areas, superposed by visual markings ( 34 ) representing expected operating positions of the supports ( 16 ).