Schematic of the helical-field structure of an AGN for arbitrary observer orientation as predicted by the Cosmic Battery. The central black hole is represented by the gray sphere, the surrounding accretion disk by the flattened yellow disk, and the axis of the system by the gray line. The white arrow indicates the direction of the disk/black hole rotation. Inner field lines threading the black hole are yellow and green. Outer field lines threading the disk are orange and red. The Cosmic Battery predicts that the axial direction of the inner/outer field is along/opposite to ω, respectively (Eq. (1)). This corresponds to an axial electric current flowing inward along the jet axis and outward farther out where the outer field lines are drawn. Field lines are wound by the black hole/disk rotation. An observer will see the transverse RMs increasing on the sky CW/CCW relative to the jet base for the inner/outer azimuthal field.