Which JROTC rank comes after Cadet Seaman?

The rank that comes after Cadet Seaman is Cadet Petty Officer Third Class. In the JROTC rank structure, the progression typically moves from the lower ranks to the higher ranks based on experience, leadership, and proficiency. After a Cadet Seaman, who is at the beginning level of enlisted ranks in the JROTC program, the next advancement is to Cadet Petty Officer Third Class, indicating the cadet's development of leadership skills and greater responsibilities within the unit.

Cadet Seaman Apprentice and Cadet Ensign represent either the very introductory level or a significant leadership rank, but they do not follow directly after Cadet Seaman. The Cadet Petty Officer Second Class, being a higher rank, comes after Cadet Petty Officer Third Class, completing that sequence of rank ascension. Therefore, the answer reflects the correct sequence in the JROTC hierarchy.