What must be done when shifting from shore power to generator power?

When shifting from shore power to generator power, it is essential to use the spru tags correctly. Spru tags are an important safety measure in electrical systems, especially when transitioning between different power sources. They serve multiple purposes: they provide a clear indication of whether systems are connected to shore power or generator power, help prevent accidental reconnection to shore power while the generator is supplying electricity, and ensure that all personnel are aware of the power source being utilized. This proper tagging helps maintain safety and minimizes the risk of equipment damage or electrical hazards during the power switch.

The other options, while related to operational safety and efficiency, do not directly address the critical procedure of ensuring correct protocols when changing power sources. Reducing engine load, switching off all systems, or checking weather conditions might be part of broader operational procedures, but they do not encompass the specific requirements and safety protocols necessary for the transition between power sources.