  We consider the problem of motion of the heavy gyrostat in the case of
Kowalevski-Yehia. To classify the bifurcation diagrams on iso-energetic levels
we establish the existence of motion conditions in terms of parameters on the
bifurcation surfaces. Obtaining these conditions in the form of explicit
inequalities we build the separating set in the "energy-gyrostatic momentum"
plane. Thus the electronic atlas of iso-energetic diagrams is created.
