What is the headquarters for the 4th Fleet?

The correct answer is Mayport, FL, because the United States Navy's Fourth Fleet is headquartered there. This fleet is responsible for maritime operations in the Caribbean, Central and South America, and surrounding waters. The establishment of the Fourth Fleet in Mayport reflects strategic initiatives to enhance regional partnerships, security cooperation, and to support humanitarian missions in that area.

Mayport’s unique geographical location allows for easier access to important naval operations in the Caribbean and South American regions. This is particularly vital given the emphasis on collaborative exercises and engagements with allied nations in these waters.

Other locations listed, such as San Diego, Norfolk, and Hawaii, are significant in their own right as home to various Navy commands and fleets, but they do not serve as the headquarters for the Fourth Fleet. Each of these places has distinct roles within the Navy’s organizational structure, focusing on operations, training, or logistics for different naval forces.