What collar device represents a Chief Warrant Officer (CWO4)?

The correct answer reflects the specific insignia representing a Chief Warrant Officer 4 (CWO4) in the U.S. Navy or Marine Corps. A CWO4 is identified by a silver bar that features three blue breaks. These elements signify the rank and establish a clear distinction from other warrant officer ranks, with each break on the insignia representing the officer's advancements and the level of authority they hold. This visual representation is essential for identification and rank recognition within military settings.

Understanding this insignia helps personnel quickly differentiate among the various ranks and grades of officers, particularly within the chief warrant officer ranks. Other options do not match the established insignia for a CWO4, making it clear why the silver bar with three blue breaks is the correct representation for this particular rank.