Effects of noncircular motion (σ) on the observed PA (χ^tot) for different inclinations (left to right: i = 30°, 60°, and 80°) and magnetic fields (upper panels: radial field, middle panels: toroidal field, lower panels: vertical field), as a function of the azimuth in the disk coordinates. Different directions of motion correspond to σ = 90° (solid black lines), 110° (dashed red), 150° (dash-dotted green), and 180° (dotted blue). The emitting matter is assumed to be located in the equatorial plane (η = 0) at a distance of r = 5, with a dimensionless velocity obeying Luminet’s law.