Due to the increasing development of the maritime industry in terms of economy, reduce emissions of harmful substances into the atmosphere and increasing the performance of all parts of the ship developed in parallel and fuel systems, lubricants and water that support these same goals. In order to select the optimum fuel, lubricant and water for a system on ship is necessary to know characteristics and working conditions. In the final work is describes the use of fuel, oil and water which can be found on all of today's modern ships. None of the systems within the machine ship can not perform its function without a well-designed system of fuel, oil and water and this can best be seen in the operating diesel engine. In the final work described each of these refrigerants, their purpose and the chemical and physical properties, explained the conditions of exploitation, the role and required properties that fuel, oil and water must have. The aim of this work is to provide information to the development of the application of fuel, lubricants, water affect the quality of work of maritime engineers on ship.