What is the sleeve device for the O-4 rank in the Navy?

The sleeve device for the O-4 rank in the Navy, which is the rank of Commander, is characterized by two half-inch gold stripes with one quarter-inch gold stripe in between. This design reflects the rank's distinction and serves to visually differentiate it from other officer ranks. The combination of the two wider gold stripes represents the seniority over the junior ranks, while the smaller stripe between them signifies additional authority and responsibility that comes with the O-4 designation. This specific arrangement of stripes helps maintain a standardized visual rank structure within the Navy, ensuring clarity both in identification and hierarchy among personnel.