Distribution of template clusters shown projected onto the supergalactic plane. Positions are shown in redshift space (CMB frame) with no correction for peculiar velocities. Clusters are shown as open stars if they lie above the SGP (i.e., at +SGZ) and filled hexagons if they lie below it. Clusters used to define the "reference frame" in § 5 are circled. The Pisces‐Perseus (PP) region contains the nearby clusters NGC 383, NGC 507, and Abell 262. In the "GA" region the five template clusters are Antlia, Hydra, NGC 3557, Centaurus 30, and ESO 508. The concentric dashed circles shown radii of 3000, 6000, and 9000 km s⁻¹. The Galactic plane (~±20°) is indicated.