The American Waterways Operators (AWO), the national trade association for the tugboat, towboat and barge industry, hailed a study conducted for the Transportation Research Board of the National Academies of Sciences, Engineering and Medicine which concludes that “[t]here is currently no scientific data to support […] a change in hours of service” for towing vessel crewmembers. Instead of regulatory changes to hours of service, which “are not likely to be the most effective way to increase sleep durations and improve sleep quality…