Abstract: The research relates to reliability study of shipboard electrical equipment, particularly marine electric motor drives. Based on the operation condition performed research, it was confirmed that reliability which directly may affect the ship running operational safety and cost effectiveness, related to main integrated features of seaboard electrical equipment representing relatively complex technical products. Analytic and experimental researches containing integrated knowing the failures and the marine electric motor drives related to the main shipboard electrical equipment and connected to reliability and effectiveness growth in technical operation were the most solvable problems. Analytic and experimental researches containing integrated knowing the failures and the marine electric motor drives related to the main shipboard electrical equipment and connected to reliability and effectiveness growth in technical operation are the most solvable problems.