What is the collar device for an O-5 in the Navy?

In the context of U.S. Navy officer ranks, the collar device for an O-5, which is the rank of Commander, is represented by one silver oak leaf. This symbol is significant because it reflects the authority and position held by a Commander within the Navy structure. The oak leaf is a traditional military insignia that symbolizes strength and leadership, and the use of silver differentiates the rank from other levels of command, where different materials or styles are employed. Understanding this is crucial for recognizing and interpreting rank insignia in the military, as each rank employs specific symbols to denote the level of leadership and responsibility.