ASVAB Line Scores for Marine Logistics and Supply MOS (04, 30, 31, 35)

For Marine logistics and supply jobs, the best score profile is more mixed than most people expect. GT and CL carry the broadest weight, but MM becomes more relevant when the path includes vehicles, heavy equipment, or maintenance-adjacent work.

Which fields this covers

This article covers four enlisted occupational fields:

• 04 Logistics: maintenance management, embarkation, and air delivery support
• 30 Supply Administration and Operations: inventory control, supply records, and material issue
• 31 Distribution Management: movement control, cargo coordination, and transportation support
• 35 Motor Transport: vehicle operation, automotive maintenance, and convoy support

The score profile is broader here because the work is broader. Some of these jobs lean on documentation, routing, and administrative accuracy. Others bring in vehicles and equipment where mechanical knowledge starts to matter.

GT and CL composites explained for logistics applicants

The GT composite is VE + AR + MC. VE (Verbal Expression) combines your Word Knowledge and Paragraph Comprehension subtests. AR is Arithmetic Reasoning, which is applied math under time pressure. MC is Mechanical Comprehension.

For logistics and supply work, the VE component matters more than the MC piece inside GT. Inventory tracking, routing documentation, embarkation planning, and supply-chain systems all require verbal accuracy. You need to read instructions carefully and write clear reports without errors. Weak WK or PC performance shows up fast in jobs that depend on records being right.

AR is equally important. Logistics Marines deal with quantities, weights, dates, lead times, and accountability numbers constantly. AR measures whether you can work through applied math problems under pressure, which is exactly the skill those jobs need.

CL is VE + MK. The MK (Mathematics Knowledge) piece adds algebra-level quantitative ability to the verbal foundation. That combination is well suited to supply and administrative work: written communication plus quantitative record-keeping. If a job is centered on forms, documentation systems, supply orders, and inventory reconciliation, CL is the composite doing the most screening work.

Why these two composites fit logistics:

• Verbal accuracy (WK and PC) drives the documentation quality that keeps supply records clean
• Math reasoning (AR) handles quantity calculations, requisition math, and accountability audits
• MK adds the algebra-level quantitative layer needed for clerical and inventory roles
• The combination covers the full administrative and analytical load of non-vehicle logistics

When MM enters the picture

MM is AR + MC + AS + EI. It adds Auto and Shop Information (AS) and Electronics Information (EI) to the AR and MC base. The result is a composite aimed at mechanical and maintenance-intensive jobs.

For most of OccFld 04, 30, and 31, MM is not the primary gate. Supply, distribution, and logistics coordination lean on GT and CL first. But once motor transport enters the picture (OccFld 35), the calculus shifts. Vehicle operators and automotive maintenance technicians work with equipment where mechanical knowledge has real daily relevance. MM becomes the more important composite for those paths.

The table below shows how the composite focus changes by logistics path:

If motor transport is not your target, treat MM as a bonus score rather than a primary study goal. Build GT and CL first and revisit the MC and AS material once the verbal and math work is solid.

Logistics field breakdown

Each of the four fields has a slightly different center of gravity, which shapes which composite does the most work at screening time.

04 Logistics is broader than it sounds. It covers maintenance-management data, embarkation planning, and specialized air delivery. The work demands verbal precision and planning math more than mechanical skills, so GT and CL carry the load.

30 Supply is the field most tightly aligned with CL. Supply chain specialists and inventory management specialists spend a lot of time on records, requisitions, and accountability. All of that rewards the verbal-plus-quantitative profile CL measures.

31 Distribution sits close to supply but stays more movement-oriented. Movement coordination, passenger and cargo tracking, and distribution-management support all call for planning discipline and communication accuracy. GT and CL carry that load here too.

35 Motor Transport breaks into two tracks. The operator side (3531 Motor Vehicle Operator) runs convoys and tactical vehicles, and GT is the primary gate there. The maintenance side (3521 Automotive Maintenance Technician) works on vehicles and fleet readiness, where MM carries more weight.

Study sequence for logistics applicants

Because AR appears in both GT and MM, studying it early pays double dividends. Start with the verbal work, then move into math, then add the mechanical content if motor transport is in the plan.

If GT and CL are the primary targets:

If MM is also needed (motor transport path):

Add dedicated MC and AS study in week 3. Mechanical Comprehension and Auto and Shop Information are the two subtests most applicants underestimate. MC tests whether you understand gears, levers, pulleys, and pressure rather than whether you can name car parts. AS is more applied and rewards basic shop and vehicle familiarity. A light review of both is enough for most applicants who already have a practical mechanical background. Plan a full dedicated week if that background is thin.

Because AR shows up in GT and MM, any time spent on Arithmetic Reasoning directly improves both composites. Study it early and review it again in week 4.

Score margin and civilian career transfer

Logistics is one of the Marine fields that moves most cleanly into civilian employment. Supply chain, distribution, inventory management, and operations coordination all exist in civilian employers, and those employers recognize the Marine experience.

A stronger GT and CL profile does more than open MOS doors. It also strengthens the credential story you bring to a civilian employer later. Employers who hire for supply chain analyst, operations coordinator, or logistics management roles look for quantitative and verbal ability in candidates. The same composite skills that qualify you for 30 and 31 jobs are the skills civilian hiring managers test for in interviews. Investing study time now to build real margin in GT and CL pays out twice: once at MEPS and again when you separate.

Logistics MOS school and training pipeline

Marine logistics Marines attend MOS school after completing Boot Camp. The location and length of training vary by occupational field. Supply Marines in OccFld 30 attend training at Fort Gregg-Adams, Virginia, where they learn supply chain management, inventory control, and the Marine Corps supply system that tracks every item from requisition to issue. The course covers the Global Combat Support System-Marine Corps (GCSS-MC), which is the primary logistics information system the Marine Corps uses for supply chain operations.

Distribution management Marines in OccFld 31 train on movement control, cargo documentation, and transportation coordination. Their training covers the systems and procedures that keep Marines and their equipment moving from point of origin to point of need. Motor transport Marines in OccFld 35 follow separate tracks. Motor vehicle operators attend driver training that covers tactical vehicle operation, convoy procedures, and vehicle recovery. Automotive maintenance technicians attend a mechanical-focused course that covers diagnostics, repair, and maintenance of the Marine Corps vehicle fleet.

Logistics Marines in OccFld 04 attend training that covers maintenance management, embarkation planning, and air delivery operations. Embarkation planning is a specialized skill that involves calculating weight and balance for ship and aircraft loading, sequencing equipment for offload, and ensuring that units can deploy with the right equipment in the right order. This work requires both the verbal precision and the quantitative reasoning that GT and CL measure.

The training pipelines for logistics MOSs are generally shorter than combat arms MOSs, but they carry their own demands. Supply and distribution Marines must master complex information systems and maintain accuracy under time pressure. A single error in a supply requisition or embarkation manifest can delay an entire unit’s deployment. The same composites that qualify you for the MOS at MEPS are the ones that predict whether you will handle the schoolhouse material without falling behind.

Use this as a starting framework. Adjust based on your current diagnostic score and which composites are furthest from your target.

The order matters. The verbal work in week 1 builds the WK and PC foundation that feeds directly into VE, which shows up in both GT and CL. The math work in week 2 handles the AR and MK components. Week 3 is where paths diverge: logistics-only applicants can use week 3 for a second pass on weak math or verbal subtests, while motor transport applicants should dedicate it to MC and AS. Week 4 is always timed drills. Do not skip full-length practice tests. Pacing under test conditions is its own skill.

For a complete breakdown of Marine line scores and study strategies, the ASVAB guide covers composite formulas, subtest descriptions, and preparation paths by field.

For related reading on logistics and supply career options, see ASVAB Scores for Every Marine MOS and Best Marine Logistics MOS for Civilian Supply Chain Careers.