The ship has main and auxiliary machines. With these machines, the movement of the ship and standing on the sea is provided. Machine journals contain important information for the machine. Machine journals; all the information about the main and auxiliary machinery on the ship is written, their working hours are specified, their previous failures and how to resolve these faults are printed books. Correct and regular operation of these instruments affects the movement of the ship. When a machine failure occurs, it is necessary to intervene as soon as possible. It is an important danger that the ship which is cruising on the sea or ocean will suffer a mechanical failure. The fault must be remedied in a short time. Therefore, the machine logs should be filled in correctly and in detail.