Why must the GMDSS operator be able to set-up FEC & ARQ modes and differentiate between them?

Correct Answer: Option D — Both a) and b) are correct

GMDSS operators must distinguish between ARQ and FEC modes for regulatory compliance. ARQ is required for two-way, error-corrected distress traffic, while FEC is essential for receiving one-way MSI broadcasts. Proficiency in both ensures the vessel maintains continuous access to safety information and can communicate effectively during distress incidents.