Which document confirms the ship's gross tonnage after measurement?

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Multiple Choice

Which document confirms the ship's gross tonnage after measurement?

Explanation:
Gross tonnage reflects a ship’s internal volume, not its weight, and after the measuring process prescribed by the tonnage convention is completed, the official proof of those figures is issued on the International Tonnage Certificate. This certificate, issued by the flag state, confirms the measured gross tonnage (and net tonnage) and must be carried on board. It is the document authorities rely on to verify tonnage for regulatory purposes, including safety requirements and tonnage-based dues. The other listed documents serve different roles—safety equipment, cargo securing procedures, and medical provisioning—and do not certify tonnage.

Gross tonnage reflects a ship’s internal volume, not its weight, and after the measuring process prescribed by the tonnage convention is completed, the official proof of those figures is issued on the International Tonnage Certificate. This certificate, issued by the flag state, confirms the measured gross tonnage (and net tonnage) and must be carried on board. It is the document authorities rely on to verify tonnage for regulatory purposes, including safety requirements and tonnage-based dues. The other listed documents serve different roles—safety equipment, cargo securing procedures, and medical provisioning—and do not certify tonnage.

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