United States Navy (USN ili skraćeno the Navy) je mornarica Sad-a i kao takva dio oružanih snaga SAD. Ona je sa 333.488 aktivnih vojnika i 123.711 rezervista potencijalno najjača mornarica na svijetu u čijem se sastavu nalaze 281 brod i 3.700 aviona i helikoptera Osim ovih, u sastavu mornarice se i pješadijske jedinice, te jedinice za specijalne namjene (npr. Navy Seals. Njena uloga je odbrana teritorija i interesa SAD na moru. U zadnje vrijeme, dolaskom terorističkih organizacija i njihovim globalnim jačanjem, Navy mijenja ulogu i služi kao prva udarna snaga u borbi protiv terora. Krajem 2SR, američka mornarica je podijeljena u združene jedinice (flote) podijeljene po operacionim područjima. Zbog kasnije izvršene reorganizacije, brojevi jedinica ne odgovaraju redoslijedu (1. flota je pregrupirana i time postala 3. itd.). Po operacionim područjima podijeljene flote: 2. Flota, Atlantik, 3. Flota, centralni i istočni Pacifik, 4. Flota, Karibi i centralna i Južna Amerika, 5. Flota, bliski istok, 6. Flota, Sredozemlje, 7. Flota, zapadni Pacifik i Indijski ocean.

      The United States Navy (USN) is the naval warfare service branch of the United States Armed Forces and one of the seven uniformed services of the United States. The U.S. Navy is the largest in the world; its battle fleet tonnage is greater than that of the next 13 largest navies combined. The U.S. Navy also has the world's largest carrier fleet, with 11 in service, one under construction (two planned), and one in reserve. The service had 328,516 personnel on active duty and 101,689 in the Navy Reserve in January 2011. It operates 286 ships in active and more than 3,700 aircraft. The mission of the Navy is to maintain, train and equip combat-ready Naval forces capable of winning wars, deterring aggression and maintaining freedom of the seas.

      United States Navy ratings are general occupations that consist of specific skills and abilities. Each naval rating has its own specialty badge, which is worn on the left sleeve of the uniform by each enlisted person in that particular field. Working uniforms, such as camouflage Battle Dress Uniforms, utilities, coveralls, and Naval working uniform, bear generic rate designators that exclude the rating symbol. Just as an officer has rank, not a rate, an officer's occupation (if drawn more narrowly than an officer of the line) is classified according to designators and professional staff corps. Ratings should not be confused with rates, which describe the Navy's enlisted pay-grades. Enlisted sailors are referred to by their rating and rate. For example, if someone's rate is Petty Officer 2nd Class and his rating is Boatswain's Mate, then combining the two—Boatswain's Mate 2nd Class (BM2)—defines both rate and rating in formal address or epistolary salutation.

      Merged into Personel Specialist on 1 October 2005.  Perform clerical and administration duties involved in maintaining personnel records, preparing reports and accomplishing accounting procedures. Counsel enlisted personnel concerning Navy ratings, training, advancement, educational opportunities, and the rights, benefits and advantages of a Navy career.

SHIP'S SERVICEMAN

      Ship's servicemen manage and operate shipboard retail and service activities using microcomputers. This includes ship's stores, vending machines and video games, barber shops, laundry and dry cleaning plants, and tailor shops. The 26-day SH training school is conducted at Meridian,MS.

HOSPITAL CORPSMAN

     Hospital Corpsmen are mediacl professionals who provide health care to service people and their families. They serve as pharmacy technicians, medical tehnicians, nurse's aides, physician's or dentist's assistants, battlefield medics, and more. All work falls into several categories: first aid and minor surgery, patient transportation, patient care, prescriptions and laboratory work, food service inspections, and clerical duties.

     Utilitiesmen plan, supervise and perform tasks involved in installation, maintenance and repair of plumbing, heating, steam, compressed air, fuel storage and distribution systems, water treatment and distribution systems, air conditioning and refrigeration equipment, systems, as prescribed by drawings and specifications; schedule and evaluate installation and operational tasks; prepare records and reports; maintain individual combat readiness; and perform tasks required in combat and disaster preparedness or recovery operations.

PHOTOGRAPHER'S MATE

       Merged into Mass Communication Specialist (MCS) on 1 July 2006. MCS are concerned with public affairs and visual communications. Their role is to present the US Navy to Naval and civilian audiences, through a variety of media. MCs write and produce both print and broadcast journalism, including news and feature stories for military and civilian newspapers, magazines, television and radio stations. They record still and video photography of military operations, exercises, and other Navy events.

OCEAN SYSTEMS  TECHNICIAN

     Merged into Sonar Technician on 1 October 2005. ST's are responsible for underwater surveillance. They assist in safe navigation and aid in search, rescue and attack operations. They operate and repair sonar equipment. ST's track underwater threats and send tracks to fire control (antisubmarine warfare controlling station) operator (ASWCS)for further evaluation and or destruction.

      Electronics Technicians are responsible for electronic equipment used to send and receive messages, detect enemy planes and ships, and determine target distances. They maintain, repair, and calibrate all electronic equipment used for communications, detection tracking, identification, and navigation. Electronics Technicians are employed onboard nuclear to maintain the control subsystems in nuclear reactors.

     Machinery Repairmen perform organizational and intermediate maintenance on assigned equipment and in support of other ships, requiring the skillful use of lathes, milling machines, boring mills, grinders, power hack saws, drill presses, and other machine tools; portable machinery; hand tools; and measuring instruments found in a machine shop.

      Merged into Mass Communication Specialist (MCS) on 1 July 2006. MCS are concerned with public affairs and visual communications. Their role is to present the US Navy to Naval and civilian audiences, through a variety of media. MCs write and produce both print and broadcast journalism, including news and feature stories for military and civilian newspapers, magazines, television and radio stations.

      Enginemen operate, service and repair internal combustion engines used to power some of the Navy's ships and most of small craft. Most Enginemen work with diesel engines. Enginemen also operate and maintain electrohydraulic controllable pitch propeller systems and steering engines, refrigeration and air conditioning systems, air compressors, desalinization plants and small auxiliary boilers.

AVIATION

AVIATION BOATSWAIN'S MATE

      Aviation Boatswain's Mates are responsible for aircraft catapults, arresting gear and barricades. They operate fuel and lube oil transfer systems, as well as direct aircraft on the flight deck and in hangar bays before launch and after recovery. They use tow tractors to position planes and operate support equipment used to start aircraft.

      Aviation Ordnancemen operate and handle aviation ordnance equipment. They are responsible for the maintenance of guns, bombs, torpedoes, rockets, and missiles. Their duties include the stowing, issuing, and loading of munitions and small arms.

     Aviation Electronics Technicians are responsible for the maintenance of all aircraft radio, radar, and other rapid communications devices. They maintain all navigation equipment.

NAVAL AIRCREWMAN

      Naval Aircrewman operate airborne radar and electronic equipment used in detecting, locating, and tracking submarines. They provide information for aircraft and surface navigation and act as helicopter-rescue crewmen, and function as part of the flight crew on long-range and intermediate-range aircraft. Beginning in 2009, other enlisted Aviation ratings that perform flight engineer or loadmaster duties in Navy aircraft were convert to the AW rating.

Many thanks to Alen Davidson and James Polhemus  for indentifying this insignias