Why was the Union's naval blockade successful?

The Union's naval blockade was successful due to its implementation of a well-coordinated strategy that utilized a large fleet of ships to effectively seal off Southern ports. This blockade severely restricted the Confederacy's ability to import essential goods, including weapons, food, and medical supplies, while also hindering their ability to export cotton and other commodities. The Union navy’s superior resources and technological advancements, such as ironclad ships, further enhanced the blockade's effectiveness. As a result, the blockade significantly weakened the Southern economy and military capacity over time.