Abstract: Apparatuses and methods for controlling the stability of elevating systems, such as personnel lifts. In one embodiment, a stability control apparatus includes an angle detector and a signal processor. The angle detector is mounted to a boom of a personnel lift and configured to detect an angle of inclination of the boom relative to an independent reference frame independent of the personnel lift. The signal processor is operatively connected to the angle detector and is configured to receive a first signal initiated by the angle detector when the angle of inclination reaches a predetermined angle. The signal processor is further configured to output a second signal in response to receiving the first signal causing a boom control system to limit movement of the boom relative to the independent reference frame when the angle of inclination reaches the predetermined angle.