A rear admiral is a senior naval officer rank in many navies, including the United States Navy. It is typically above the rank of captain and below vice admiral. The title often indicates a flag officer who commands a group of ships or a naval task force. In terms of insignia, a rear admiral usually wears a star on their uniform, which distinguishes them from lower ranks. The role involves significant responsibilities, including strategic planning, operational command, and leadership of personnel within the naval fleet.