A guidance system guides a driver to drive a service vehicle, such as a baggage loading vehicle, into a prescribed parking position adjacent to an aircraft without colliding with the aircraft. The guidance system includes at least two indicator markers, preferably marker lights, arranged spaced apart from one another on the aircraft. The two markers present a prescribed visual pattern, e.g. an alignment of the two markers, along a line of sight defining a safe approach path. If the driver steers along this safe approach path so that he sees the prescribed visual pattern of the markers, then a collision between the vehicle and the aircraft will be avoided. Alternatively, a projector projects a light pattern such as a projected boundary marker line onto the ground surface adjacent to the aircraft to mark a safe collision-free approach path.