How many five-point silver stars does an O-8 in the Navy have on their collar device?

In the Navy, an O-8 rank corresponds to a Rear Admiral (Upper Half). The collar device for an O-8 features two five-point silver stars. This distinction is recognized within the Navy's insignia system, where stars indicate rank and additional stars denote higher positions. Therefore, for an O-8, the presence of two five-point silver stars accurately reflects their rank. Understanding the Navy's insignia helps in identifying the hierarchical structure of officers, where the number of stars directly correlates to the officer's rank.