Fieldlines of magnetic induction B₀ (blue) and the field C (red) perpendicular to both the magnetic induction and the flux function, in the case ϵ = 1 for the y = 0 plane. Due to azimuthal symmetry other such planes have identical fieldline structure. The flux function A (green) in this case is azimuthal about the spine, running antiparallel to  above the fan plane and parallel to  below ( ⊗  corresponds to a vector directed towards the point of view, and  ⊙  away). These vector fields are everywhere perpendicular thus suitable for forming an orthogonal coordinate system, although fields C and A are undefined on the spine and fan plane.