The United States Navy classifies its enlisted personel with a systems of rating rate. For example, Aerographer's Mate 1st Class would be AG1.
Aviation Ratings (http://www.chinfo.navy.mil/navpalib/ranks/ratings/av-rates.html)
- AB — Aviation Boatswain's Mate
- AC — Air-Traffic Controller
- AD — Aviation Machinist's Mate
- AE — Aviation Electrician's Mate
- AG — Aerographer's Mate
- AM — Aviation Structural Mechanic
- AO — Aviation Ordinanceman
- AS — Aviation Support Equipment Technician
- AT — Aviation Electronics Technician
- AW — Aviation Warfare Systems Operator
- AZ — Aviation Maintenance Administrationman
Construction Ratings (http://www.chinfo.navy.mil/navpalib/ranks/ratings/con-rate.html)
- BU — Builder
- CE — Construction Electrician
- CM — Construction Mechanic
- EA — Engineering Aide
- EO — Equipment Operator
- SW — Steelworker
- UT — Utilitiesman
- BM — Boatswain's Mate
- CS (formerly MS) — Culinary Specialist (Mess Specialist)
- CT — Cryptologic Technician
- DK — Disbursing Clerk
- DM — Draftsman
- DT — Dental Technician
- ET — Electronics Technician
- FC — Fire Controlman
- FT — Fire Control Technician
- GM — Gunner's Mate
- HM — Hospital Corpsman
- IS — Intelligence Specialist
- IT — Information Systems Technician
- JO — Journalist
- LI — Lithographer
- LN — Legalman
- MA — Master-at-Arms
- MN — Mineman
- MT — Missile Technician
- MU — Musician
- NC — Navy Counselor
- OS — Operations Specialist
- PC — Postal Clerk
- PH — Photographer's mate
- PM — Patternmaker
- PN — Personnelman
- PR — Aircrew Survival Equipmentman
- RP — Religious Programs Specialist
- QM — Quartermaster
- SH — Ship's Serviceman
- SK — Storekeeper
- SM — Signalman
- STG — Sonar Technician–Surface
- STS — Sonar Technician–Submarine
- TM — Torpedoman's Mate
- YN — Yeoman
Engineering/Hull Ratings (http://www.chinfo.navy.mil/navpalib/ranks/ratings/eng-rate.html)
- DC — Damage Controlman
- EM — Electrician's Mate
- EN — Engineman
- GS — Gas Turbine System Technician
- HT — Hull Technician
- IC — Interior Communications Electrician
- MM — Machinist's Mate
- MR — Machinery Repairman
Naval Enlisted Sailors are referred to casually by their rating. For example, Yeoman First Class John Smith would casually be referred to as YN1 (said: "Y, N, one"). U.S. Navy officers do not have ratings.
Also included in a sailor's rating is their "community"; for example, if Yeoman First Class Smith has earned his enlisted submarine qualification, his title would be YN1(SS) John Smith.
It is possible to "stack" these if an individual has earned multiple qualifications.
