What is the rank indicated by a shoulder device with four five-point silver stars in the Navy?

In the Navy, the rank indicated by a shoulder device with four five-point silver stars is that of a Fleet Admiral. This insignia signifies the highest possible rank within the Navy, which is O-10. The rank of Fleet Admiral is usually held during wartime and is a unique position designed to ensure that there is an officer at the top of the Navy hierarchy, giving them authority over all naval operations.

The shoulder device with four stars is distinctive and is only worn by those who have attained this specific rank, as it represents a level of command and responsibility that is rare and reflects exceptional service and leadership within the Navy. Therefore, the association of four silver stars with the rank of Fleet Admiral aligns with the established insignia and rank structure of the Navy.