Which maintenance functions can a GMDSS Radio Operator perform?

Correct Answer: Option A — The Operator is responsible for ensuring that INMARSAT antennas are free of built-up soot and clear of obstacles.

GMDSS radio operators are strictly limited to routine operational checks, battery testing, logkeeping, and external cleaning such as ensuring Inmarsat antennas remain free from soot, debris, and physical obstructions. Internal adjustments require a licensed maintainer.