How does the U.S. Navy defend U.S. interests at sea?

The United States Navy defends national interests by maintaining security on the high seas and providing seaborne support to other military branches.1

To project power and protect interests globally, the Navy utilizes several strategic approaches:

• Strategic Deterrence: The Navy maintains a fleet of nuclear-powered submarines capable of launching intercontinental ballistic missiles while submerged. These vessels serve as a vital component of the nation's strategic-deterrence forces.2
• Carrier-Based Power: Modern naval task forces are built around fast-moving aircraft carriers, which allow the military to strike at great distances with carrier-based air power.2
• Littoral and Inland Operations: The Navy demonstrates flexibility by operating in both "blue water" (open ocean) and "brown water" (inland waterways) environments. This allows for close-air support, artillery fire, and the disruption of enemy supply lines in littoral regions.2
• Technological Adaptation: The service continuously integrates advanced weaponry, including guided missiles and nuclear propulsion, to ensure its fleet remains capable of projecting influence and conducting atomic warfare if necessary.2