Question 311Safety & Environmental - 1st Asst/Chief

The correct answer is D) a certified marine chemist. Before making any welded repairs to the internals of a vessel's fuel tank in a U.S. port, the tank must be examined by a certified marine chemist. This is a requirement set forth by regulations to ensure the safety of the repair work. A certified marine chemist has the expertise to properly test the tank for any hazardous gases or conditions that could pose a risk during the welding process. The other options (insurance underwriter, master of the vessel, and chief engineer) do not have the necessary certification and qualifications to conduct this critical safety examination.