  The Tully-Fisher relationship is subject to morphological type dependence
such that galaxies of morphology similar to ScI galaxies and Seyfert galaxies
are more luminous at a given rotational velocity than galaxies of other
morphological classification. This effect is most prevalent in the B-band. It
is shown that the type effect is not simply an artifact of the calibrator
sample, but is also present in cluster samples. The type effect is corrected by
creating type dependent Tully-Fisher relations for ScI group galaxies and
Sb/ScIII group galaxies. It is shown that with single calibrations, the
distances to ScI group galaxies are systematically underestimated while the
distances to Sb/ScIII group galaxies are systematically overestimated.
Tully-Fisher slope and scatter is also considered in the context of Type
Dependent Tully-Fisher relations. It is concluded that the use of type
dependent Tully-Fisher relations provide significant improvement in the
distances to individual galaxies and refined distances to clusters of galaxies.
