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On the sea a captain is usually the commander of a large warship—a cruiser, battleship, or aircraft carrier in the navy and any sizable ship in the mercantile marine service.
In the navy, admiral is one of the highest ranks. The military is full of rankings, such as captain, private, major, and corporal. Another is admiral, a ranking specific to the navy. While a captain is in charge of one ship, an admiral leads more than one ship: a bunch of ships, which are called a fleet.
The master, or sailing master, is a historical rank for a naval officer trained in and responsible for the navigation of a sailing vessel. The rank can be equated to a professional seaman and specialist in navigation, rather than as a military commander.
Seaman is the third enlisted rank from the bottom in the U.S. Navy and U.S. Coast Guard, ranking above seaman apprentice and below petty officer third class. This naval rank was formerly called seaman first class, such as Medal of Honor recipient James R.
Master refers to professional qualification, captain to a state of command or authority.
Commander (CDR, O5)
A senior officer, a CDR may command a frigate, destroyer, fast-attack submarine, smaller amphibious ship, aviation squadron, SEAL team or shore installation.
Cadet. The term 'cadet' is primarily used by the Navy and the Coast Guard, though some sailing organizations also use the term. A cadet is a trainee or inexperienced sailor who comes aboard and participates (usually in a limited capacity) in shipboard duties. Cadets are the lowest-ranking sailors aboard a ship.
Captain is the name most often given in English-speaking navies to the rank corresponding to command of the largest ships. The rank is equal to the army rank of colonel and air force rank of group captain.
Admiral is one of the highest ranks in some navies. In the Commonwealth nations and the United States, a "full" admiral is equivalent to a "full" general in the army or the air force, and is above vice admiral and below admiral of the fleet, or fleet admiral.
admiral, the title and rank of a senior naval officer, often referred to as a flag officer, who commands a fleet or group of ships of a navy or who holds an important naval post on shore. The term is sometimes also applied to the commander of a fleet of merchant vessels or fishing ships.
The rank of admiral (or full admiral, or four-star admiral) is the highest rank normally achievable in the U.S. Navy. It ranks above vice admiral (three-star admiral) and below fleet admiral (five-star admiral).
comparison with captain
Navy a commodore is ranked above a captain and below a rear admiral; the designation has usually been used only in wartime. Outside the navies, the master of any vessel is addressed as captain, and the term is usually applied as a courtesy to marine pilots.
The majority of Navy SEALs (about 2,000) are Navy Enlisted personnel (E-4 to E-9). They are led by roughly 500 SEAL Officers (O-1 to O-10). There is also a small number of SEAL Warrant Officers (circa 30) who rank as officers above the senior-most Enlisted but lower than an Officer (O-1).
The Bismarck could reach over 30 knots, almost 35mph. This was an incredible speed for a ship so heavy, making it a terrifying prospect to face in open seas. The Bismarck was one of the first two ships commissioned to be built by the Nazis, the first of the Kriegsmarine and the beginning of a new regime.
SS often stood for "steamship," as steam what made these vessels operate. It was also a clear indicator that a boat differed from the slower performing means of propulsion, such as sailing and rowing power.
Non-commissioned US Navy support vessels receive the special designation “USNS” (United States Navy Ship). Another long standing military prefix is “HMS,” which is short for “Her (or His) Majesty's Ship.” This is the British equivalent to USS and refers to all vessels of the Royal Navy.
Another tradition is to consider ships as female, referring to them as 'she'. Although it may sound strange referring to an inanimate object as 'she', this tradition relates to the idea of a female figure such as a mother or goddess guiding and protecting a ship and crew.
Fleet admiral (abbreviated FADM) is a five-star flag officer rank in the United States Navy whose rewards uniquely include active duty pay for life. Fleet admiral ranks immediately above admiral and is equivalent to General of the Army and General of the Air Force.
Master chief petty officer (MCPO) is an enlisted rank in some navies. It is the ninth (just below the rank of MCPON) enlisted rank (with pay grade E-9) in the United States Navy and United States Coast Guard, just above Senior Chief Petty Officer (SCPO).
2) Nickname for the Vice Admiral serving as Commander, Naval Air Forces who is responsible for the manning, training, and equipping of all aircraft, personnel, and the U.S. Navy's fleet of aircraft carriers.
Skipper is an informal name for the captain, a way to address the person who's at the helm of a boat or in command of a Navy ship. The word skipper comes from the Dutch schipper, from schip, or "ship." Sometimes this word is also used for the captain of a team or the pilot of an airplane.
On most vessels, the Chief Mate is second in command after the Captain. Some vessels, usually cruise ships or large passenger vessels, have First Mate/Officers. This role is typically junior to the Chief Mate/Officer.