What are two major contributions made by the unions navy during the civil war?

During the Civil War, the Union Navy played a crucial role in implementing a naval blockade that restricted the Confederacy's trade and access to supplies, significantly weakening their war efforts. Additionally, the Union Navy was instrumental in conducting amphibious assaults and securing key locations along the Southern coastline, such as New Orleans and Port Royal, which helped to gain control of strategic waterways and support ground forces.