Abstract
Unlike summer period sailing in ice conditions is connected with the necessity of going through ice of 1,5 m thickness within 100 days beginning with the second part of December. Marine routes of the Azov Sea also have flexible time limits caused by weather conditions both on the intensity and the period of the perturbation. Ice passability to the ports of Mariupol and Berdyansk changes according to the season. It is connected with the changes of weather conditions – power and direction of wind, temperature of air and water. The greatest changes of isochrom position can be observed from December to January moving to the south and from February to March moving to the north. That’s why there are all kinds of natural obstacles in the Azov Sea for active navigation. The data collected for thirty years of navigation has been used for the analysis due to the dynamics of the ice formation and ice fields. The characteristics of the ice field on the section of the water way have been determined for severe, moderate and mild winters. The limiting dependencies of the terms when ice phenomena and the characteristics of ice cover appear have been found out. The step-by-step algorithm for predicting the condition of ice cover to form the convoys of the vessels is suggested.
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