Tully-Fisher distances from roughly 10,000 spirals yield H₀ near 75 to 76, above even SH0ES and 8 units above Planck, from a relation whose baryonic form is among the tightest laws in extragalactic astronomy. The audits find percent-level calibration issues that cannot span a ten-percent discrepancy, and the method's depth, tens of thousands of galaxies across the local few hundred megaparsecs, makes it less a rung than a survey of the volume where the high values live.
One global H₀ makes TF's 75 an embarrassment to be audited rather than a data point to be located: the model cannot ask where the TF sample sits, only whether its zero-point is wrong, and the relation's own tightness, which certifies the physics, deepens rather than relieves the discomfort.
SCT explains both the ruler and its reading. The ruler: the baryonic Tully-Fisher relation is a coherence law, dynamics locked to baryons through the deterministic amplification A with the registered constant of 44.8 solar masses per (km/s)⁴ (P50, P52, P54), which is why the relation is tight enough to survey with, no stochastic halo scatter to blur it. The reading: the TF sample blankets the local few hundred megaparsecs, the most enhancement-weighted sampling volume of any method, so its H₀ should sit at the top of the high camp, above ladder methods whose supernova hosts reach deeper, exactly the observed ordering: TF near 75, ladder near 73, time delays near 73, chronometers and CMB near 67 (P17, P19). The methods are rungs on the gradient, ranked by the depth of what they sample.
TF's sky coverage then makes it the mapping instrument the single-number framing wastes: ten thousand spirals with distances and redshifts can chart directional H₀ structure across the local volume, the Migkas-style anisotropy and the void-versus-overdensity contrast, at a granularity no anchor-based method reaches. The registered prediction is that TF H₀ varies across the sky correlated with environment, several percent peak-to-peak, recoverable from the existing CosmicFlows catalogs. Foundations in Paper 13, From Chaos to Coherent Gravity (the BTFR derivation), and Paper 1 (P17, P19).
Two blades: a directional analysis of the TF catalogs finding H₀ isotropic and environment-independent at the 2 percent level removes the gradient where it should be most visible; and the BTFR constant drifting from the derived 44.8 under improved baryonic accounting breaks the coherence law that makes the ruler trustworthy. The high reading itself is also exposed: TF recalibrations converging to 67 would place the entire local volume at the global rate and falsify the enhancement.