What is the rank insignia of a Fleet Admiral during wartime?

The rank insignia of a Fleet Admiral during wartime is characterized by distinctive features that differentiate it from lower ranks. The specific insignia consists of one two-inch gold bar with four half-inch gold stripes above it, symbolizing the highest possible rank in the Navy. This design reflects the authority and distinction associated with the role, which is typically conferred only during times of war. The combination of the large gold bar and the numerous stripes indicates the seniority and extensive responsibility of someone holding the Fleet Admiral rank.

The other options present insignias that either relate to other naval ranks or do not accurately depict the insignia associated with a Fleet Admiral, which maintains a clear distinction from other titles within the naval hierarchy. Thus, recognizing the elements of the Fleet Admiral's insignia helps in understanding the hierarchy and structure of naval ranks during wartime.