In the event of failure of the main and emergency sources of electrical power -- what is the term for the source required to supply the GMDSS console with power for conducting distress and other radio-communications?

Correct Answer: Option B — Reserve source of energy

The Reserve Source of Energy is the mandatory secondary power supply required by SOLAS Chapter IV. It must be capable of operating the GMDSS console for a defined period if the main and emergency generators fail, ensuring the vessel maintains its ability to transmit and receive distress alerts.