All life jackets and life buoys shall be marked with the vessel's name in letters at least __________. (small passenger vessel regulations)

Correct Answer: Option A — Height not specified

46 CFR 180.72 specifies that life jackets and life buoys must be marked with the vessel's name. Unlike the Official Number, which has specific size requirements, the regulation for the vessel's name on these items does not mandate a specific letter height, provided the marking is clearly legible.