Which of the following is an obligation when using the flag?

• A. Follow laws and regulations
• B. The right to fly the flag
• C. The right to fish in territorial waters
• D. Diplomatic protection by naval forces

Answer: (A)

When a vessel uses a flag, it falls under the jurisdiction of the flag state, and the primary obligation is to follow the laws and regulations of that country as well as applicable international rules. This means complying with safety, pollution prevention, crew qualifications, registration, inspection, and the numerous conventions the flag state has adopted. Keeping to these rules is essential because it ensures the vessel operates legally and safely on the world’s seas, and violations can lead to penalties, detention, or loss of the flag. The other options describe rights or services that aren’t obligations tied to flag use: flying the flag is a privilege tied to registration, fishing rights depend on coastal state regimes, and naval protection is a state-provided service rather than a duty imposed by flag use.