What's the responsibility of vessels under GMDSS?

• A. Every ship is able to perform those communications functions essential for the Safery of the ship itself and of other ships
• B. Only coastal stations must maintain readiness
• C. Not required for small vessels
• D. GMDSS is optional

Answer: (C)

GMDSS obligations depend on vessel size and voyage. The system is required for ships on international voyages or above a certain gross tonnage, ensuring their distress and safety communications are standardized and guaranteed. Smaller vessels that operate only domestically are not required to carry or maintain GMDSS equipment. They can rely on basic marine radio gear, but GMDSS readiness isn’t mandated for them. The other statements don’t fit how GMDSS applies: it isn’t universal for all ships, it isn’t limited to coastal stations, and it isn’t optional for those ships that fall under its requirements.