"At all times, the U.S. Coast Guard is a military service and a branch of the armed forces, a federal law enforcement agency, a regulatory agency, a first responder, a humanitarian service, and a member of the Intelligence Community. The Coast Guard is the world's premier, multi-mission, maritime service responsible for the safety, security, and stewardship of the Nation's waters. In the execution of its duties within DHS, the Coast Guard serves on the front line for a Nation whose economic prosperity and national security are inextricably linked to its maritime interests. In this capacity, the Coast Guard protects and defends more than 100,000 miles of U.S. coastline and inland waterways, saves thousands of lives per year, and safeguards the world's largest Exclusive Economic Zone (EEZ), encompassing 4.5 million square miles. [...] Based on the 2016 MNS [Mission Needs Statement], the Coast Guard developed an updated CONOPS [concept of operations] for the major asset classes operating in the offshore environment (major cutters, patrol boats, and rotary and fixed wing aircraft) that are undergoing recapitalization. This CONOPS describes the operational activity and characteristics of the asset class. Collectively, the current recapitalization projects, excluding polar-class icebreakers, comprise the Offshore Program of Record (POR). This report describes the offshore fleet operating environment and describes the CONOPS under a mission framework."
Department of Homeland Security: https://www.dhs.gov/