What is the primary function of a Carrier Strike Group (CSG) in the US Navy?

The primary function of a Carrier Strike Group (CSG) in the US Navy is naval power projection. A CSG typically consists of an aircraft carrier, which serves as the centerpiece and is accompanied by various supporting vessels including destroyers, cruisers, and submarines. This configuration allows the CSG to deploy a significant air wing that can conduct a variety of missions, including air superiority, reconnaissance, and strike operations, all of which contribute to projecting military power far from U.S. shores.

Power projection enables the United States to respond to crises, deter potential adversaries, and assure allies where needed, showcasing military capability and readiness. This flexibility makes CSGs invaluable assets in operations that require a strong maritime presence.

The other options focus on distinct military functions. Marine amphibious operations involve the deployment of forces in a joint operation that primarily relies on landing ships and is associated with the Marine Corps rather than the Navy's core operational capacity. Transporting cargo, while a crucial aspect of naval logistics, is typically the domain of cargo ships and support vessels rather than the combat-oriented nature of a CSG. Coastal defense generally refers to operations focused on protecting territorial waters and infrastructure, which falls outside the primary offensive capabilities of a CSG.