Final answer:
STA-21 is a commissioning program in the United States Navy that consists of various components including education, training, and military service requirements.
Step-by-step explanation:
STA-21, which stands for Seaman-to-Admiral-21, is a commissioning program in the United States Navy.
It consists of several components, including a rigorous education curriculum, leadership training, and military service requirements.
Upon successful completion of the program, participants are commissioned as officers in the Navy.