  It is argued that an irregularity in the baryon stopping is a natural
consequence of onset of deconfinement occurring in the compression stage of a
nuclear collision. It is an effect of the softest point inherent in an equation
of state (EoS) with a deconfinement transition. In order to illustrate this
effect, calculations within the three-fluid model were performed with three
different EoS's: a purely hadronic EoS, an EoS with a first-order phase
transition and that with a smooth crossover transition.
