Disk trace of the brighter NE arm (blue) and the fainter SW arm (red). The disk has a clear tilt, with both arms deviating from the average disk plane at smaller separations, which isthe reference plane in this figure. This implies a high degree of forward-scattering and/or asignificant deviation from an edge-on inclination (see text). The spatial scalings of the x- and y-axes are very different, which causes a strong visual exaggeration of the tilt angles.