46 C.F.R. § 169.750 Radio call sign.
Title 46 - Shipping
Each vessel certificated for exposed or partially protected water service must have its radio call sign permanently displayed or readily available for display upon its deck or cabin top in letters at least 18 inches high.
Title 46: Shipping
PART 169—SAILING SCHOOL VESSELS
Subpart 169.700—Vessel Control, Miscellaneous Systems, and Equipment
Markings
§ 169.750 Radio call sign.
