The Coast Guard Office of Standards and Evaluations is responsible for promulgating regulations which are data-driven and evidence-based. The Coast Guard queries on several data sources, namely the Marine Investigation Safety and Law Enforcement (MISLE), to better understand the population of vessels that operate on U.S. waterways. The following information is a graphical representation of the number of vessels by primary service classification of the vessel that were active and operating on U.S. navigable waters.