PSU 313 (U.S. Coast Guard) The PSU 313 refers to a specific course offered within the curriculum of various educational institutions, often in the field of criminal justice or homeland security studies. This course focuses on the unique role and functions of the United States Coast Guard (USCG), a branch of the armed forces responsible for maritime law enforcement, search and rescue missions, and environmental protection activities within U.S. territorial waters and on international waters. The course content may cover topics such as the history, organization, and mission of the USCG; maritime laws and regulations; search and rescue techniques; marine environmental protection; counter-drug operations; and homeland security issues related to coastal regions and waterways. The aim is to provide students with a comprehensive understanding of the Coast Guard's role in ensuring public safety and national security on the water.