  Dynamical crossover in water is studied by means of computer simulation. The
crossover temperature is calculated from the behavior of velocity
autocorrelation functions. The results are compared with experimental data. It
is shown that the qualitative behavior of the dynamical crossover line is
similar to the melting curve behavior. Importantly, the crossover line belongs
to experimentally achievable $(P,T)$ region which stimulates the experimental
investigation in this field.
