Which rank is not considered a W-5 title?

The title of Senior Chief Petty Officer is not classified as a W-5 rank because it falls under the Enlisted ranks category rather than the Warrant Officer category. In the Navy, Warrant Officers, including the W-5 designation, are specialized officers who command advanced technical skills and experience.

W-5 ranks are specifically granted to Chief Warrant Officers who have achieved a high level of expertise and responsibility within their field. The ranks included in the W-5 classification are distinct from enlisted ranks such as Senior Chief Petty Officer, which corresponds to E-8, indicating an advanced but still strictly enlisted position. The other choices represent junior officer ranks (Lieutenant Junior Grade and Ensign) and a warranted rank (Chief Warrant Officer), all of which align with the W-5 designation in some capacity. Thus, Senior Chief Petty Officer does not belong in the W-5 category.