Question 1989 Deck Safety

The correct answer is A) test welds for subsurface defects. Ultrasonic testing is commonly used in the maritime industry to determine the thickness of a vessel's shell plating, which is important for assessing the structural integrity of the hull. Additionally, ultrasonic testing can be used to inspect welds for any subsurface defects that may not be visible to the naked eye. This helps ensure the quality and safety of critical welded joints on the vessel. The other answer choices, while related to vessel maintenance and inspection, do not accurately describe common applications of ultrasonic testing. Ultrasonic testing is not typically used to check the wear of the rudder carrier bearing, provide tail shaft clearances, or test the links of anchor cables.