Navy Enlisted Rating: Aviation Ordnanceman (AO)

These sailors handle weapons aboard Navy aircraft

Aviation Ordnanceman Airman Cleans And Inspects Ordnance
Aviation Ordnanceman Airman Wong Thao, of St. Paul, Minnesota, cleans and inspects ordnance staged in the bomb farm on the flight deck aboard the aircraft carrier USS Enterprise (CVN 65) Septmeber 8, 2006 in the Arabian Sea. U.S. Navy / Getty Images

Aviation ordnancemen (AOs) have some of the more high-risk responsibilities in the armed forces. In the Navy, they handle and service weapons and ammunition carried on Navy aircraft. The Navy Occupational Specialty (NOS) code for this position is A420.

Dangerous Duties of Aviation Ordnancemen

Their duties include inspecting, maintaining and repairing the aircraft's mechanical and electrical armament/ordnance systems.

Aviation ordnancemen also stow, assemble and load aviation ammunition that may include anything from aerial mines and torpedoes to missiles and rockets.

They'll service bomb, missile and rocket releasing and launching devices, and service aircraft guns. And they assemble and test air-launched guided missiles, and supervise the operation of aviation ordnance shops, armories and stowage facilities.

Working Environment for Navy Aviation Ordnancemen

AOs perform their duties at sea on flight decks and ashore in hangars, on flight lines at air stations or in shops under various environmental conditions. They work closely with others, do mostly physical work and require little supervision.

It may not seem like a job handling weapons would translate well into work in a civilian field. But after Aviation Ordnancemen are discharged from the Navy, they have skills that qualify them for a range of civilian jobs, such as air traffic controllers or aviation safety inspectors.

Qualifications and Requirements to Be a Navy Aviation Ordnaceman

After basic training, sailors in this rating (which is what the Navy calls its jobs) spend nine weeks at the Naval Air Technical Training Center on Pensacola Naval Air Station in Florida for "A" School training.

Once they've completed "A" School, depending on the duty they've been assigned, AOs will either spend two weeks in a ship's company strand course or three weeks in an airwing strand course (strand training is platform-specific on-the-job training).

Before they qualify for "A" School, however, candidates pursuing the Aviation Ordnanceman job will need to score 185 in the Verbal Expression (VE), Arithmetic Reasoning (AR), Mathematics Knowledge (MK) and Automotive and Shop Information (AS) sections on the Armed Services Vocational Aptitude Battery (ASVAB) test. Alternately, they could score 140 on the Mathematics Knowledge, Automotive and Shop Information and Assembling Objects (AO) sections of the ASVAB.

Aviation Ordnancemen will need to be able to qualify for Secret security clearance. 

In addition, these sailors need vision of 20/100 correctable to 20/20, normal color perception and normal hearing. 

Sub-Specialties Available for This Rating: Navy Enlisted Classification Codes for AO

Sea/Shore Rotation for Aviation Ordnancemen

According to the Navy,  Aviation Ordnancemen can expect to spend more than half their careers on sea duty assignment.

  • First Sea Tour: 53 months
  • First Shore Tour: 36 months
  • Second Sea Tour: 60 month
  • Second Shore Tour: 36 months
  • Third Sea Tour: 48 months
  • Third Shore Tour: 36 months
  • Fourth Sea Tour: 48 months
  • Fourth Shore Tour: 36 months

Note: Sea tours and shore tours for sailors that have completed four sea tours will be 36 months at sea followed by 36 months ashore until retirement.

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