Which rank is represented by the insignia featuring one eagle above three chevrons?

The insignia featuring one eagle above three chevrons corresponds to the rank of Petty Officer First Class. In the Navy's enlisted ranking system, the eagle represents the first class designation, while the three chevrons indicate the specific rank level within the Petty Officer hierarchy. Each tier within the Petty Officer ranks features a unique combination of chevrons and insignia:

• Petty Officer Second Class has two chevrons, and

• Seaman Apprentice does not have any chevrons and is signified by a different insignia altogether, focusing on their trainee status.

• The Master Chief Petty Officer insignia includes a gold star above three chevrons, indicating a more senior level than Petty Officer First Class.

Thus, the combination of the eagle and three chevrons clearly identifies the rank of Petty Officer First Class.