During the Special Survey the propeller is removed and shaft pulled into the vessel. Which of the following tests must be performed on the propeller shaft prior to refitting?

Correct Answer: Option A — The tapered section must be checked for cracks using non-destructive testing.

ABS Rules and 46 CFR require non-destructive testing (NDT) on the tapered section of the propeller shaft during special surveys. This area is highly susceptible to stress concentrations and fatigue cracking. Inspecting the taper ensures the structural integrity of the shaft-to-propeller connection, preventing catastrophic failure at sea.