For a small passenger vessel inspection, reserve power batteries must be tested:

The requirement for testing reserve power batteries at intervals not exceeding 12 months, or during the inspection, aligns with safety regulations that ensure the operational reliability of essential systems on small passenger vessels. This testing frequency is designed to ensure that the batteries are capable of providing power during emergencies, thereby enhancing the safety of both the vessel and its passengers.

By testing the batteries during inspections as well, it allows for immediate evaluation and servicing if any issues are detected, leading to timely repairs or replacements. This is particularly important in a maritime environment where battery failure could lead to significant safety risks. Maintaining a rigorous testing schedule contributes to the overall reliability and safety standards that are crucial for passenger vessels.

While other frequencies may seem adequate, they do not meet the regulatory requirements that prioritize the safety and preparedness of marine operations. Regular and thorough testing is essential to mitigate risks and ensure that reserve battery systems function correctly when needed.