What is the requirement for emergency and reserve power in GMDSS radio installations?

Correct Answer: Option D — All newly constructed ships under GMDSS must have both emergency and reserve power sources for radio communications.

SOLAS Chapter IV mandates that all GMDSS-equipped vessels must have both emergency and reserve power sources. The emergency generator provides power for general ship services, while the reserve source of energy specifically ensures that radio installations remain operational for distress and safety communications during a total power failure.