Linked from
The 16 pages that link to Tully–Fisher relation, each with the reason it gives.
GalaxyRelated: It links galactic dynamics to observable properties and enables distance estimates.
Spiral galaxyRelated: It links measurable disk rotation to galaxy brightness and distance estimates.
Cosmic flowRelated: It estimates galaxy distances for large peculiar-velocity samples.
Local VoidRelated: It can estimate distances needed to map galaxy motions around the Local Void.
Local SheetRelated: It provides distance estimates that help map nearby galaxy structures.