**5. System Configuration and Subsystem Classification of the Hybrid Power System for Ships Subject to FMEA Evaluation**

The fuel cell-based hybrid power system for ships consists of a power generation, power distribution, output performance verification, and control and management system. Figure 5 shows the subsystems of each system. The power produced by the power generation system is dispersed in the power distribution system, and the product of the output verification system is regulated according to the control and management system commands. The power distribution, output performance verification, and control and management systems have already been applied to all the ships currently under construction; hence, their operation reliability is sufficiently secured, and they were excluded from the FMEA of this study. Out of the subsystems of the hybrid power system, the power generation system (i.e., the failure mode and failure effect of the power source) was evaluated.

**Figure 5.** System configuration and subsystem classification of the hybrid power source for the ship.
