The process of transshipment of bulk cargo within the Eastern cargo terminal of the sea port of Novorossiysk has been considered. A method for calculating the performance of the crane group has been developed, taking into account the interaction of cordon and rear crane subgroups. The method is based on the practical process flow charts of Novorossiysk port for processing coal, cast iron and iron ore. There has been presented the designed method for calculating the coefficient of predicted performance of cargo handling for transshipping the bulk cargoes (e.g., coal, iron ore and cast iron) based on the data on performance of crane equipment, allocated resources (handling equipment and dock machine operator teams). The forecast performance ratio allows to determine whether the operation schedule is ahead or behind the standard of the process flow charts. The method of calculating the forecast time of transshipment of bulk cargoes has been offered, subject to the influence of meteorological factor on productivity of cargo operations. The formulas for calculating the estimated time of the cargo operations at all possible mutual locations on the time axis of the segments of the weather conditions and the time of the operation have been given.