What safety measure should be observed when maintaining marine electrical systems?

When maintaining marine electrical systems, it is crucial to disconnect power sources before performing any maintenance. This practice is fundamental to ensuring the safety of personnel and preventing electrical shocks or accidents while working on potentially live circuits.

By disconnecting power, you eliminate the risk of electrical energy flowing through the system while you are conducting your maintenance tasks. This precaution allows for safer inspections, repairs, or replacements of electrical components without the added danger of live voltage.

In marine environments, where water can enhance the conductance of electricity, taking this step is even more critical. It helps to ensure that both the individual performing maintenance and the surrounding crew members are safe from potential electrical hazards.