Dry-docking for a vessel not enrolled in an underwater survey program in lieu of dry- docking is due at what interval?

Correct Answer: Option C — 2 times in 5 years, with the interval between dry dockings not to exceed 3 years.

Per 46 CFR requirements for vessels not under an underwater survey program, the dry-docking interval is two times in five years. To ensure structural integrity and prevent excessive fouling or corrosion, the regulation mandates that the interval between any two consecutive dry-docking examinations must not exceed three years.