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Nowadays a lot of ports and quays are constructed in the areas with seasonal ice cover. Ice can prevent marine operations and lead to lost of time and therefore lost of money. One of the solutions to prevent ice adfreeze to marine and ocean structures is heating of the quayage. Heating prevents ice formation and provides acceptable conditions for loading/unloading of the vessels. The process and technology for this process are not properly described in the existing literature. However, estimation of the amount of the heat which is needed to prevent ice formation is vitally important and influences the entire construction project. The amount of heat can be estimated by a numerical simulation. The work also proposes the mathematical way for rough estimation of the power needed to prevent freezing in the ice. Mathematical estimation correlated with the numerical estimation. Calculations are made for possible time for the vessel to spend in the port – two weeks of freezing during −10 °C (140 freezing-degree-days). [ABSTRACT FROM AUTHOR]