what is the rank of admiral in the navy
Admiral of the Navy (United States) The Admiral of the Navy (abbreviated as AN) is the highest possible military rank in the United States Navy. The rank is intended as an "admiralissimo" type position which is senior to the rank of fleet admiral.
Sea captain A sea captain, ship's captain, captain, master, or shipmaster, is a high-grade licensed mariner in ultimate command of the merchant vessel.[1] The captain is responsible for its safe and efficient operation, including: ship's seaworthiness, ship's safety and security conditions, cargo operations, navigation, crew management and ensuring that the vessel complies with local and international laws, as well as company and flag state policies.[2] All persons on board, particularly during navigation, including, public authorities, state authorities, officers and crew, other shipboard staff members, passengers, guests and pilots, are under the captain's authority and are his or her ultimate responsibility.