  The distribution of the arrival zenith angle of the Extensive Air Showers
(EAS) with a wide range of a total number of charged particles is studied using
the experimental data obtained using the EAS 4-detector array 'TSU' in Tbilisi.
The station is a part of the GELATICA net in Georgia (GEorgian Large-area Angle
and TIme Coincidence Array), which is devoted to the study of possible
correlations in the arrival times and directions of separate EAS events over
large distances. It is shown that the distribution function with the
conventional exponential dependence of showers' flux on absorbing air thickness
provides a good approximation for the arrival direction distribution. The
dependence of the EAS absorption path estimation on the angular trimming
boundary of data set is studied; the necessity of strict verification of the
used value of data trimming boundary is stated.
