Question 3562 Deck General

The correct answer is A) Fatigue. Fatigue is virtually impossible to detect during an in-service inspection of used mooring chain. Fatigue damage occurs over time and repeated loading, causing internal cracking that is not visible from the outside. Visual inspections can only detect surface-level issues like cracks, elongation, or loose studs, but cannot assess the internal condition of the chain. Detecting fatigue requires more advanced testing methods like magnetic particle inspection or ultrasonic testing, which are not typically part of routine in-service inspections. The other options (B, C, D) can be more readily identified through visual and manual inspections, making fatigue the most challenging problem to detect without specialized equipment.