What collar device signifies the rank of O-10 in the Navy?

The rank of O-10 in the Navy is represented by four five-pointed silver stars on the collar. This designation is reserved for the highest-ranking officers, specifically the rank of Admiral. Each star symbolizes a level of authority, with the accumulation of four indicating the topmost operational and strategic leadership within the Navy. Understanding the insignia system is crucial as it denotes not only rank but also the level of responsibility and leadership expected from the officer. This system of insignia requires a precise understanding of the hierarchical structure within naval ranks, where each additional star signifies a substantial increase in command authority and experience.