46 C.F.R. § 148.03-7 During transport.
Title 46 - Shipping
During the transport of a solid hazardous material in bulk, except for unmanned vessels, cargo shall be periodically inspected to ensure that there are no undetected increases in temperature in that cargo and that no other changes in the cargo are occurring that might affect the safety of his vessel and the results of these inspections shall be recorded in a log.
Title 46: Shipping
PART 148—CARRIAGE OF SOLID HAZARDOUS MATERIALS IN BULK
Subpart 148.03—Minimum Transportation Requirements
§ 148.03-7 During transport.