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    The BMST is the Basic Math and Science Test.  It covers Algebra, Physics, Geometry and Electrical fundamentals.

    You have three hours to complete the test without the use of calculator.  You will need to contact your closest Education Center to schedule the date and time for them to administer the test.  The following information is required in order to start the registration process:

      1) AKO USER NAME   

      2) Enterprise Email Address

      3) Current ERB


    Prospective Prime Power School students are strongly encouraged to self-evaluate and enhance their mathematics and basic science skills prior to taking the Basic Mathematics and Science Test (BMST). 

    During the academic training portion of the Prime Power Production Specialist course mathematics application to physical science principles is very intensive. The Operator portion of the Prime Power Production Specialist course and the accompanying Additional Skill Identifier (ASI) courses require the rapid application of these mathematics and science skills through performance events.

    There are several excellent mathematics/science web based programs of instruction that provide step-by-step individualized instruction, with self-paced lessons and practice. These programs cover Basic Mathematics, Pre-Algebra, Algebra I&II, Geometry, Trigonometry, Vectors, Acceleration, Newton's Laws, etc. In preparation for the BMST and upon acceptance to the Prime Power School, mathematics and science reviews should NOT include Calculus or Calculus based Physics.

    The Prime Power School utilizes Khan Academy as a suggested additional resource for students wanting or needing additional assistance that are currently enrolled in courses.  We also use the DOE Fundamentals Handbook Mathematics Volume 1 and 2 (DOE-HDBK-1014/1-92) and (DOE-HDBK-1014/2-92) for getting students back into good work/study habits and assistance when difficulty in grasping concepts occurs. These resources are ideal for the initial Prime Power course of study



12P Course

  • 12 Upcoming Classes

Course Information

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Course Information

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7 Dec 2020

4 Jan 2021

Dec 2021



12 Apr 2021

26 Apr 2021

May 2022

  003-21 9 Aug 2021 23 Aug 2021 Aug 2022


Dates are subject to change.  Check ATRRS catalog or contact the PPS for current info.  For complete course information use ATRRS course catalog, use school code 227L

 With the completion of the Academic section, students will earn 38 college credits from Lincoln University, Jefferson City, Missouri. The credits are awarded as follows:


 PHY 101 College Physics I; Lab I 4.0
 PHY 102 College Physics II; Lab II 4.0
 PHY 330 Heat and Thermodynamics 3.0
 PHY 331L Heat and Thermodynamics Lab               1.0
 MAT 112 Applied Algebra 3.0
 MAT 176 Applied Technical Mathematics  3.0
 ET 101 Basic Electronics; Lab  3.0
 ET 104 Circuit Analysis  3.0
 ET 104L Cirtcuit Analysis Lab  2.0
 ET 204 Electrical Machines; Lab  3.0
 CS 103 Intro Microcomputers  3.0
 ET 216 Electrical & Mechanical Schematics, Drawings, Blueprints     


 ET 217 Equipment Operator Training, Safety and Health  3.0
 Total  38.0


The table below reflects the credits awarded from American Council of Education (ACE).  The web site for ACE is


 Course ACE, Degree ACE, Certificat
12P20 Basic Course  38  0
12P20/ASI-S3 Electrical      20 0
12P20/ASI-E5 Instrument  13 0
12P20/ASI-S2 Mechanical  7 3
12P30 ALC  8 0



Prospective applicants must meet the following prerequisites as stated in DA Pamphlet 611-21, paragraph 10-12P, in order to be considered for course attendance. 

  • Be a graduate of Basic Leaders Course
  • Be in Grade E4, E4P or E5 and subject to career field requirements.
  • Minimum of interim SECRET access prior to class start date.
  • Be a high-school graduate or have a General Education Development (GED) Diploma.
  • A minimum score of 110 in the GT Aptitude Area, a minimum score of 107 in ELEC and TECH Areas.
  • Earn a score of at least 70% in Basic Mathematics and Science proficiency exam (BMST).
  • Have documentation of successful completion of a high school or college-level Algebra Course (transcript).
  • Have completed a minimum of 24 months of Active Duty Service by class start date.
  • Met the Time in Service Remaining Requirements at beginning of training in accordance with
    • AR 614-200 (Active Duty Applicants).
    • AR 135-200 (Reserve Component Applicants)

 Physical demands and qualifications

  • Physical demands rating of Moderately Heavy. (Tested by Applicant's Retention Office with OPAT if required) OPAT Score Card.pdf
  • Medical fitness standards per AR 401-501
  • Physical profile of 111121.  Verification required on DD Form 2808.  (All waiver requests will be submitted with application for consideration on a case by case basis) (No profile   above a "2" will be waivered) USAPPS Request for Waiver format.doc
  • Physical Exam less than 1 year old.  DD Form 2808
  • Normal color vision, to include the ability to distinguish between red and green. Color Vision Test results to be indicated on the DD Form 2808, Block # 66.  
  • Good eye hand coordination.
  • Minimum OPAT scores of:
    • Standing Long Jump - 0160 cm
    • Seated Power Throw - 0450 cm
    • Strength Deadlift - 0160 lbs
    • Interval Aerobic Run - 0043 shuttles

Thank you for your interest in the Prime Power School. For more information regarding course enrollment eligibility and prerequisites will be posted at this location in the near future.  For up-to-date information please contact the Prime Power School at 573 596-0303 DSN: 581-0303. 


Purpose: To train selected personnel to perform common (ASI immaterial) Prime Power Supervisory Tasks and to supervise subordinates. To complement 12P30 training by building on leadership skills, introducing new doctrine and refreshing those areas of high learning decay.

Course Scope: Develops common Supervisory task skills, knowledge, and abilities; History and Doctrine of Prime Power Operations: Occupational Health and safety Requirements, safety inspections and risk assessments; Theater of Operations electrical systems planning; Power generation and distribution equipment shipment; Power Plant site reconnaissance and survey; Project Management; Power Plant Electrical Systems and Equipment; Power Plant Installation; Start up, operation, and maintenance; Surface laid, underground and aerial distribution systems, equipment, materials, and construction methods; Power Plant Mechanical systems and equipment; Power Plant Instrumentation systems and equipment; and Substation Maintenance.

Course Prerequisites: Effective as of 01 Jan 2008: Active Army or Reserve Component enlisted personnel with recommendation of Commanding Officer, and qualified in MOS 12P or 12Q. First Priority will be given to Staff Sergeants and Promotable Sergeants. Second Priority will be given to Non-Promotable sergeants who because of unit shortages are performing in positions for which the training is designed. All personnel must have successfully completed the Warrior Leadership Course (WLC) at least six months before attending this course.


DPGDS Operator training provides the student with the skills and knowledge necessary to safely perform siting and installation; crew level Preventative Maintenance Checks and Services (PMCS); qualify personnel to start-up; single and multi-unit (parallel) set operations; and shutdown procedures. Parallel operations with the DPGDS and MEP-012A will be conducted. Review of the hazards associated with electrical energy. Instruction reviews the effects of arc-blast and electrical shock on equipment and personnel. Studies include the effects of electricity on the human body, rescue and first aid techniques. Course includes the MEP-PU-810A/B major components description, location, functions and operational parameters; design notes; and operator level maintenance. Instructor lead discussion of DPGDS power distribution equipment, including installation, operation and maintenance of the following: Primary Distribution Switching Center, Secondary Distribution Center, Secondary Distribution Modules; Grounding requirements for power distribution equipment; Control of Hazardous Energy (Lock-out/Tag-out) requirements and procedures for DPGDS equipment; other safety requirements associated with distribution equipment installation, operation and maintenance.


Air Force students must be graduates of Power Pro Training; Army students must be graduates of 12P MOS Training; Civilians must be qualified and trained in Medium Voltage.

DPGDS Support Maintenance training qualifies personnel to maintain the MEP-PU-810A/B's electrical and mechanical systems. Instruction concentrates on the A.C. and D.C. electrical systems of the MEP-PU-810A/B Prime Power Unit and associated Power Distribution Equipment. That includes the field removal and replacement of the Primary Distribution Center; construction of medium-voltage power cables. Mechanical training on the Caterpillar 3456 engine and associated engine systems of the MEP-PU-810A/B Prime Power Unit consist of the following. Field removal and replacement of the engine/generator set; removal and replacement of engine components, troubleshooting procedures; safety precautions associated with electrical and prime mover maintenance system.


Active Army, MOS 210A warrant officers who are currently in, or projected for, an assignment to a Power Plant Operation and Maintenance Team. Active and Reserve Component Army or Navy enlisted personnel who are qualified in MOS 52E (Army) and NEC 5633 (Navy). Army or Navy civilian personnel currently assigned to a center for public works type organization as operator of the model plants. Must provide proof of certification as a qualified electrical power plant operator.

Special Information: Course meets the requirements for re-licensing and operator recertification on the MEP-208A and MEP-012A generator sets. Course may be taught on-site upon request. For additional information on the requirements for conducting training on-site, contact: Commandant, U.S. Army Prime Power School, 12630 FLW 28, Fort Leonard Wood, MO 65473 or by phone at commercial 573 596-0131 ext 66451 or DSN 581-6451.

Course Scope: Includes refresher training in the tasks, skills, and knowledge necessary to prepare the models MEP-012A and MEP-208A (Fermont 750 KW) generator sets for shipment, transportation, installation and operation. Perform equipment operation, operator troubleshooting, and operator PMCS. Also includes training in determining start-up and continuing operation POL for the MEP-012A and MEP-208A generator sets.


Active Army or Reserve Component commissioned officers (LT) and MOS 210A warrant officers who are currently in or projected for an assignment to a Power Plant Operation and Maintenance Team. Active and Reserve Component Army or Navy enlisted personnel who are qualified in MOS 52E (Army) and NEC 5633 (Navy). Army and Navy civilian personnel currently assigned to a center for public works type organization as operator of the model plant. Must provide proof of certification as a qualified electrical power plant operator.

Special Information: Course meets the requirements for relicensing and operator recertification on the model MU 4.5 TBL Power Plant. Course may be taught on-site upon request. For special information on requirements for conducting training on-site, contact: Commandant, U.S. Army Prime Power School, 12630 FLW 28, Fort Leonard Wood, MO 65473 or by phone at commercial 573 596-0131 ext 66451 or DSN 581-6451.

Course Scope: Includes refresher training in the tasks, skills, and knowledge necessary to prepare the model MU 4.5 TBL (EMD 4.5 Megawatt, MP36 Three-Unit) power plant for shipment, transportation, installation, and operation; perform equipment operation, operator troubleshooting, and operator PMCS. Also provides training in determining POL needed for initial start-up and continuous operation.

12P PRIME POWER PRODUCT SPECIALIST COURSE:  The U.S. Army Prime Power Production Specialist Course is located at Fort Leonard Wood, Missouri. This year-long training program trains Active and Reserve Army soldiers and Navy Seabees to install, operate, and maintain, medium voltage electrical power plants. Upon graduation Army personnel are awarded MOS 12P20 and Navy personnel awarded NEC 5633. The 12P20 Course consists of an Academic Phase and Operator Training Phase. This course lasts approximately 30 weeks and provides students with the necessary knowledge and skills to install operate, and maintain, medium voltage electrical power plants. Students presently earn 32 semester hours of college credit while attaining the Academics Phase (first 15 weeks of training). The Operator Training Phase (second 15 weeks of training) provides the hands-on training to operate the Army’s inventory of medium voltage electrical power plants. The course is challenging and requires a large amount of home study.

Following completion of the 12P20 course, students are selected to attend one of three Additional Skill Identifier (ASI) Courses. The Electrical Specialty Course provides organizational support maintenance training on a wide variety of electrical power components. The Instrumentation Specialty Course provides organizational support maintenance training on AC and DC control circuits and components as well as engine and generator protective circuits and components. Both the electrical and instrumentation specialties provide in depth instruction in electronics and AC power theory. The Mechanical Specialty Course provides organizational support maintenance training on two and four stroke diesel engines to include complete rebuild practical exercises. Additionally, in depth instruction is provided on a wide variety of mechanical systems components.

Academic Training Phase: (Phase I, 12P20 Course)

The academic training phase is 15 weeks long. Students are provided knowledge in academic subjects that are necessary to master future specialty courses. Mathematics, physics, and the fundamentals of mechanical and electrical engineering are core  subject courses. Analytical and problem solving skills are developed through practical exercise, laboratory work, and assigned problems in each subject course. Presently students are enrolled in college and earn 32 college credits in the lower Baccalaureate / Associates Degree level.  College credit information.

Operator Training Phase: (Phase II, 12P20 Course)

This is a thirteen week instructional course training Army, Navy, Army Reserve in electrical safety; electrical and mechanical print reading; basic electrical distribution system design; basic understanding of the major components used in electrical distribution systems; electrical and mechanical protective systems used in electrical power production; diesel engine and electrical theory; and power plant operations to include installation, operation, repair, and maintenance of medium voltage electrical power plants.

Students learn how to operate and maintain the Army’s Multi-Unit 4.5 Megawatt electrical power plants, 3 Megawatt electrical power plants consisting of either the MEP-012A or MEP-208A 750 kilowatt generating units, and the Deployable Power Generation Distribution System (DPGDS) power system consisting of either the MEP-810A or B model .

Mechanical Specialty: (Course:661-12P/ASI-S2)

Mechanical Training Phase is 18 weeks long. Students receive crew to depot level training on power plant maintenance. The training is a combination of lecture and hands-on practical exercise.

Subject areas for the Mechanical Training Phase include Diesel Engines and Systems; Allied Skills (hand, precision and power tools); Electric Arc and Oxyacetylene Welding; Fluid Handling Systems (piping systems, air compressors and pumps); and Diesel Engine Maintenance, Troubleshooting, and Rebuild. The predominant engines in the course are the 12 cylinder, Cummins KTA38 (38 liters/2300 cubic inches), the 16 cylinder, 9072 cubic inches, General Motors Electro-Motive Diesel (EMD), and the inline 6 cylinder Caterpillar 3456 Diesel Engine.

Electrical Specialty: (Course: 661-12P/ASI-S3)

Electrical Specialty Training is 18 weeks long, consisting of 556 hours of training.  The electrical course has nine annexes.  The annexes cover Electrical Fundamentals, Basic Electronics, Electrical Practices and Standards, Motors and Generators, Machine Controllers, Cable Splicing, Transformers, Circuit Breakers and Distribution Systems.

In Electrical Fundamentals you learn the various circuit rules and calculations, how to operate test equipment for troubleshooting circuits, electronic soldering, power quality and building circuits on a breadboard.  Students training in Basic Electronics covers many different electronic devices, how they work, how to test and troubleshoot them and their function in the circuit.  Students attending the Electrical Practices and Standards classes are taught the National Electrical Code and conduit bending.  Students learn to calculate bend radius, conductor size, conductor type for a specific location, circuit protection, box fill and maximum number of conductors in a raceway.  Classes in Motors and Generators cover single-phase and three-phase motors and generators, their maintenance, troubleshooting and repair.  Machine Controllers will teach students all the different types of motor controls and why they are used, learn how to wire those controllers, diagnose faults and repair the faulty component.  In the Cable Splicing class students learn how to splice and terminate low and medium voltage power cables up to 15,000 volts; how to locate underground power cable by using a tracing tool and then find the location of the fault in the cable.  The Transformer annex covers transformer theory, calculations and construction.  Students learn how to wire single-phase and three-phase connections, test dry and oil filled transformers and test the insulating oil in the transformers.  Circuit Breaker training teaches students the maintenance, testing and repair of circuit breakers from small molded case circuit breakers all the way up to 15,000 volt air magnetic; oil filled and vacuum circuit breakers.  Distribution Systems students learn the different types of generating systems and distribution systems.  Students also learn about grounding systems, testing of grounding systems and personnel protective grounding.  In this annex we cover aerial line material, line equipment tools and how to perform an infrared survey.

This course is challenging and once the students complete the electrical specialty phase of training they are assigned to one of the Prime Power Teams throughout the world.

Instrumentation Specialty: (Course 661-12P/ASI-E5)

The purpose of the Instrumentation Course is to provide the student, Power Plant Instrumentation Specialist, with skills and knowledge in the methods and techniques necessary to safety perform instrumentation critical tasks in troubleshooting, testing, maintenance, and repair of instrumentation systems and components used on electrical power generation and distribution equipment. Upon completion of this course, the student is awarded an Additional Skill Identifier (ASI) of E-5.

This is an 18 week course that emphasizes higher-level thinking and mathematical analysis of abstract concepts involving operational theory of electronic components and systems. The course begins with a formalization of the mathematical and basic AC and DC circuit theories and concepts that were taught in the Academics Phase. From this, the course builds on the students knowledge of basic and advanced electronics, digital systems, relay control systems and automated process controls, to include programmable logic controllers (PLC’s).

Skills learned include the testing, calibration, troubleshooting and repair of systems/components used in the measurement, regulation, protection and control of signals/quantities/processes.


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Personnel wishing to apply for the Prime Power Production Specialist Course (MOS 12P20) must contact their retention. The retention NCO will pre-screen the applicant’s eligibility and assist in the completion of the application packet and when complete, will submit the application directly HRC using the RETAIN system.  If applicant is selected to attend the Prime Power School, the retention NCO will submit the appropriate follow on documents to HRC also using RETAIN. For any additional questions, please email the Prime Power School at:  Please include your name, email address and cell/office phone numbers.


The application packet must include the following documents in this order:

  1. DA Form 4187, "Personnel Action," dated and signed by soldier and company commander  DA 4187.pdf

  2. Commander Interview USAPPS Commander's Interview.doc

  3. A current and legible copy of applicants ERB

  4. A copy of BMST score certification memo

  5. High school or college transcripts showing that you have taken an algebra course or college algebra course

  6. DA Form 705, APFT Scorecard (current/within 120 days) to be provided; include Body Fat Composition Sheet if applicable. (current/within 120 days)

  7. OPAT Score Card  OPAT Score Card.pdf

  8. DD Form 2808, Report of Medical Examination (legible copy) to include color-vision, PUHLES verification, and hearing test results.  Must be signed and dated current/within 12 months

  9. Cover Sheet with your name, rank, unit/home/cell telephone numbers, and email address

  10. Submit all documents in this order in one single pdf to your Retention Personnel.

  11. Any questions can be emailed to:

Unit Commanders:

Interview the applicant to ensure that the soldier understands the requirements of the program, and that he/she has a sincere motivation, maturity, and the ability to learn in a fast- paced, academically demanding program of instruction

1.  Ensure that the applicant does not have any of the following characteristics:

     a.  Psychiatric diseases or conditions that, in the opinion of an appropriate medical officer, may adversely affect the applicant's ability to safely and reliably perform duties while under stress and/or in a hazardous environment

     b.  Evidence of alcoholism or repeated abuse of alcohol

     c.  Evidence of the unlawful use, possession, or distribution of controlled substances

     d.  Lack of emotional/mental maturity or lack of responsibility, (i.e., a disciplinary action, such as an Article 15)

     e.  Evidence of inadequate group adjustment

     f.   Negligence or delinquency in duty performance

     g.  Serious financial and family difficulties or obvious signs of general character irresponsibility

     h.  Record of serious or repeated criminal involvement with civil authorities   

2.  Counsel and advise the applicant: 

     a.  Failure to satisfactorily complete the course will result in dismissal from the program, and that the obligated term of service must be completed

     b.  Advise applicant that accrued leave should be taken prior to arrival prevent loss of leave during the one-year long course of instruction

     c.  Ensure that the soldier has taken the Basic Mathematics and Science Proficiency Test (BMST). If applicant has not been tested, a request for the BMST should be made through the local Army Education Center Test Control Officer to  Contact numbers are Commercial: 573 596 0303 or DSN 581 0303

     d.  Provide the following information in the remarks section of DA Form 4187 (see sample)

            i.  Soldier has been interviewed IAW the Commander's Interview checklist

           ii.  Soldier meets the qualifications listed in DA Pam 611-21, Chapter 10 para 10-160.21P            

          iii.  Applicant understands if accepted for training but fails to complete the course,he/she must fulfill obligated term of service based on the needs of the army

          iv.  Retention NCO POC information (email address/phone number) along with Soldier's work/unit phone number

Prior to student's packet being submitted, ensure the student has an active security clearance.  If the student does not have an active clearance they should include in their application packet a documented DD 2875 filled out and signed by their Security Officers 

 Application Submision:

1.  Applications for Regular Army personnel will be sent from local command channels in a complete pdf format directly to your Retention Personnel who will submit directly to HRC using the Retain system.  A copy of the application should be kept for your records
2.  USAR applicants will submit  a complete packet sent to your Retention Personnel.


Applications will be processed as follows:        

1.  Student applications will be submitted directly to HRC by their Retention using the Retain system.

2.  HRC will reserve the student seat in ATRRS and place the applicant on assignment with instructions to report to the U.S. Army Prime Power School (W6AH1A), Ft. Leonard Wood, MO  65473 with a reporting date approximately 15 days prior to selected course start date.

3.  For USAR Soldiers, their applications will go through USAR command channels thru the appropriate headquarters Reserve Command of the applicant. HRC will reserve the student seat in ATRRS.  The applicant’s command will issue orders attaching them to the U.S. Army Prime Power School (W6AH1A), Ft. Leonard Wood, MO  65473 with instructions to report approximately 15 days prior to course start. Reserve orders should extend approximately 15 days after graduation to allow adequate time for out processing and travel.  

NOTE:  Reservists who are accepted will attend the Prime Power School in a TCS unaccompanied status.


 **Graduates of the Prime Power School may be assigned to any one of the below listed locations.

Ft. Belvoir, Virginia

Ft. Bliss, Texas

Ft. Bragg, North Carolina

Ft. Hood, Texas


Schofield Barracks, Hawaii

US Army Reserves only -- Cranston, Rhode Island

**Locations below are possible assignments for senior SSG and SFC 12P NCOs

Belgium (NATO)

Bethesda, Maryland (Bethesda Naval Hospital)

Egypt (ARCENT)

Fort Leonard Wood, MO

South Korea

Washington DC, Pentagon / White House

US Army Reserves -- Cranston, Rhode Island

The Prime Power Production Specialist, with an associated ASI, supervises, operates, installs, maintains, and repairs electrical power plants and distribution equipment worldwide. The generating units are primarily diesel or gas turbine engine-driven models capable of producing 750 kW to 4,500 kW at 2400 or 4160 volts. Power plant operator duties include procedures for start-up, operation, monitoring, operator maintenance, and shutdown of power plant equipment and auxiliary systems. Maintenance duties include inspecting, testing, maintenance, and repair (organizational, direct and general support) support of Prime Power Program generation and distribution equipment and associated support system/equipment.

Normal progression for the Prime Power Production Specialist is from 12P20 to 12P40 for grades E-5 to E-7. After achieving the grade of E-7 (12P40), competition is with all the other soldiers in the General Engineering Career Management Field (CMF) for promotion to E-8 in MOS 12X50.

See DA PAM 611-21 for details.



  1. - Powers of Ten and Conversion of Electrical Units
  2. - Ohm’s Law
  3. - Circuits
  4. - Introduction to Cell’s and Batteries
  5. - Elements of Electrical Physics: Statics
  6. - Elements of Electrical Physics: Dynamic Electricity
  7. - Conductors, Resistors, Insulators, and Color Codes
  8. - Atomic Structure
  9. - Work, Power, and Energy (Electrical)
  10. - Magnetism and Electromagnetism
  11. - AC Theory-Related Math and Generation of a Sine Wave
  12. -Diesel-Electric Locomotives (contains very good information on diesel engine operation and maintenance)

Army e-Learning (Skillport)

“Basic Business Math Skills”.  Course can be found under “Business Skills Curricula>>Foundation Skills Curriculum>>Basic Business Math Skills”. This consists of three separate courses: “Whole Number, Fractions, and Equations”; “Decimals and Percents”; and “Ratios and Averages”.

Not only are these good for skills enhancement but they are also worth promotion points! Even if you don’t apply or don’t qualify completing AACP and Army e-Learning course can help improve your performance as a Soldier and help make you more employable in your post-Army career. Take advantage of them!

Math Software

Prospective PPS students are strongly encouraged to enhance their math skills prior to taking the Basic Math and Science Test (BMST) and attending the school. There are several good math software programs available commercially. The following list is not all-inclusive and does not constitute an endorsement by the PPS or the Department of the Army.
  • Math Advantage 2008
  • Math Success Deluxe 2008
  • Pro One Advanced Mathematics

Of course, applicants are free to use whatever they choose in preparing for the course. The Prime Power Production Specialist Course is very math intensive, especially during the academics training phase. The better prepared you are, the greater your chances of success.