NorthbeltSeems to me this would could be used with a GPS and low cost portable computer for the blind…“a belt which enables its user to feel his orientation in space via vibrotactile stimulation. This belt is equipped with a set of vibrators controlled by an electronic compass: the element pointing north is always slightly vibrating. That way, the person wearing the belt gets permanent input about his heading relative to the earth’s magnetic field.” [via] Link.