Port tugs bring large vessels into the port and take them out of the port, assist them during mooring and unmooring, move vessels from one mooring to another, tilt vessels, tow port barges, transshipment mechanisms, dredgers and other floating objects. Calculation and evaluation methods of the optimal request for tugs bollard pull port operations, are very important in order to guarantee the navigational safety of the port and ships during the main ship operations in the port.
The most dangerous situations are situations of sudden failure of the power plant when maneuvering a vessel in the confined waters of ports, when tugboats become the only means of control that can prevent an accident. This is observed when the vessel moves in an area with hazardous sections of the waterway, calls into and out of the port, as well as when performing mooring operations. Line and / or port pilots, as well as tugs for escorting, escorting or when performing mooring operations of the vessel, are additionally involved in the process of navigating the vessel. In foreign ports, there are also very tense conditions in command management due to language barriers and the need for synergistic interaction of individual independent ship crews without prior preparation for a responsible mission.
In this paper done a focus to improve tug possibilities and decrease navigational risks in port areas by method of balance handling forces. Such decrease in risks at ports is important issue to overcome, since the correct and proper usage of port tugs could highly improve the situation there.
Keywords: tugs, emergency situation, port maneuvering, energy balance of the control force.