Question 280General Subjects - 1st Asst/Chief

The correct answer is A) The tapered section must be checked for cracks using non-destructive testing. During a Special Survey, when the propeller is removed and the shaft is pulled into the vessel, the tapered section of the propeller shaft must be inspected for cracks using non-destructive testing. This is because the tapered section is the most critical part of the shaft, as it experiences the highest stresses and is prone to developing cracks over time. Checking this section for any defects is essential to ensure the safety and reliability of the propulsion system. The other options are incorrect because they do not address the specific requirement for non-destructive testing of the tapered section. Checking the entire shaft or the propeller flange for cracks is not the specific requirement for this part of the Special Survey, and checking the shaft weight is not a mandatory test in this context.