In the modern systems of operation monitoring and of early detection of technical condition changes, additionally to the monitoring and measuring function, there is required the analysis of information in purpose to support the operator in making decisions. Such high complexity of a problem needs application of the fast methods of analysing the information in variety of aspects. Presently, in monitoring of a marine piston diesel engine tremendous importance the methods have, which are based on artificial intelligence both in a meaning of analysis of the individual processes and in complex analysis of a whole object. Merits of the artificial intelligence methods are – high flexibility, versatility and possibility to use the object for analysis with no need to have a mathematical description of the examined object, or occurring processes, what often imposes the considerable difficulty and restrictions in examination to be carried out
