When a lifeline is required to be attached to a ring life buoy it must be at least __________. (small passenger vessel regulations)

Correct Answer: Option C — 60 feet long

Under 46 CFR 180.70, ring life buoys must be equipped with a lifeline that is at least 60 feet in length. This requirement ensures that the buoy can be effectively thrown to a person in the water and retrieved or held by the victim during rescue operations.