01 / Occupational profile
Your 11C occupational profile
Muzzle blast and overpressure
Assignment-dependent
Mortar crew positions are recognized in military occupational-health literature as high-overpressure roles because gunners and assistant gunners work at close, repeated proximity to the muzzle during fire missions.
Hazardous noise
Common occupational factor
Mortar firing produces impulse noise that regularly exceeds hearing-hazard thresholds, and mortar crews are typically enrolled in hearing-conservation programs.
Physical demands and load carriage
Common occupational factor
Carrying mortar tube, baseplate, bipod, and ammunition components in addition to a standard fighting load is characteristic of the occupation and heavier than a typical rifle-carrying infantry load.
Deployment-dependent exposures
Location-dependent
Post-9/11 deployments may add burn-pit smoke, dust, and combat-stressor exposure; this depends entirely on where and when the individual deployed.
Operational and combat stressors
Assignment-dependent
Mortar crews supporting maneuver units during deployment may be exposed to combat conditions, counter-fire, or casualties, but this varies by assignment and era.
02 / Your service
What did you actually do?
Your MOS is the starting point. Your actual assignment, era, equipment, location, and duties determine which parts of the occupational history are relevant. Use the Evidence Builder below to select your actual duties and see records that may corroborate them.
Mortar crews emplace, lay, and fire 60mm, 81mm, or 120mm mortar systems, then break down and displace the position, often repeatedly during a single exercise or fire mission. Gunners and assistant gunners work at the tube and baseplate, within feet of the muzzle at the moment of firing, while ammunition bearers carry and prepare rounds and propellant increments. Fire direction center personnel compute firing data under similar field conditions. Sustained fire missions during training and combat can mean dozens of rounds fired in a short period, generating repeated blast overpressure and impulse noise beyond standard small-arms exposure, plus manual handling of heavy tube, baseplate, and bipod components.
Duties that may vary by assignment
- Emplacing, laying, and firing 60mm, 81mm, or 120mm mortar systems from ground mounts or vehicle carriages
- Repeated exposure to muzzle blast and concussive overpressure at close range during live-fire missions
- Manual carrying of mortar tube, baseplate, bipod, and ammunition (individual rounds can exceed 15-30 lbs)
- Rapid displacement and re-emplacement of firing positions under load
- Fire direction center computation and communication duties in dismounted or mounted configurations
- Standard infantry field duties: foot movement, digging positions, field living conditions
Related historical codes: Mortar duties may appear under unit or position titles rather than the 11C code in older records
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Military Occupational Evidence Builder
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Military service
Army · 11C Indirect Fire Infantryman
For another specialty, open its guide from the MOS library. A job code alone does not establish individual duties or exposure.
Era(s) of service
Deployments
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Your Evidence Builder identifies records that may document your service history. If VA has already decided your claim, the next question is different: what did VA accept, what did VA reject, and why?
Request a free decision review03 / Corroboration
Building your occupational history
Records matter because they can connect a job title to an individual's actual work and circumstances.
Muzzle blast and overpressure
Records that may corroborate it
- · Weapons qualification and range-firing records showing mortar duty position
- · Unit training schedules and after-action reports documenting live-fire mortar exercises
- · DD 2215/2216 hearing-conservation audiograms tied to a mortar-crew hazard designation
- · NCOER or DA Form 2-1 entries listing gunner, assistant gunner, or ammunition-bearer duty positions
Limit: Blast exposure supports the in-service event element. It does not by itself establish a current TBI, headache disorder, or hearing loss diagnosis, or that any current condition is medically linked to that exposure.
Hazardous noise
Records that may corroborate it
- · Hearing-conservation program enrollment and DOEHRS-HC records
- · Entrance and separation audiograms for comparison
- · Range control logs and fire-mission records showing rounds fired
Limit: Documented noise exposure does not establish a current hearing-loss disability under 38 CFR § 3.385 or supply the required medical nexus for tinnitus or hearing loss.
Physical demands and load carriage
Records that may corroborate it
- · Physical profiles (DA Form 3349) documenting joint or back limitations
- · Sick-call and physical-therapy records
- · NCOER and training records describing mortar-section field duties
Limit: Typical load-carriage demands of the occupation do not prove a specific injury occurred or that a current joint or spine condition is connected to service.
Deployment-dependent exposures
Records that may corroborate it
- · Deployment orders and the DD-214 remarks block
- · Airborne Hazards and Open Burn Pit Registry participation
- · Post-Deployment Health Assessment/Reassessment (DD 2796/2900)
Limit: The MOS does not establish deployment location or dates. PACT Act presumptions depend on the statutory location and period plus a listed condition.
Operational and combat stressors
Records that may corroborate it
- · Combat badges and award citations
- · VA Form 21-0781 stressor statement and buddy statements
- · Behavioral-health treatment records during or after service
Limit: A stressor is one element of a PTSD claim; a DSM-5 diagnosis and a link between the stressor and diagnosis are still required under 38 CFR § 3.304(f).
04 / Evidence standard
What your MOS can — and cannot — establish
May help document
Work performed, circumstances of service, consistency of an alleged exposure, and the nature or duration of duties where supported by individual records.
Does not automatically establish
A diagnosis, medical causation, severity, percentage, presumption, or entitlement to service connection.
05 / Medical evidence
Conditions that may be relevant to the occupational history
This is not a list of conditions to claim. A veteran's actual diagnosis and individual service record determine relevance; occupational evidence is not medical causation.
Hearing +
Tinnitus
Why the occupation may matter: Mortar muzzle blast is an acknowledged hazardous-noise source at close range to the crew.
Records and clinical evidence: Current report of persistent tinnitus and a lay statement describing onset tied to mortar-crew duty.
Occupational history alone does not establish this diagnosis or its medical relationship to service.
Sensorineural hearing loss
Why the occupation may matter: Repeated impulse-noise exposure from mortar firing is associated with high-frequency hearing loss.
Records and clinical evidence: Audiometry meeting 38 CFR § 3.385 thresholds and a nexus opinion addressing the noise pattern.
Occupational history alone does not establish this diagnosis or its medical relationship to service.
Neurologic / TBI +
TBI residuals, chronic headaches
Why the occupation may matter: Repeated close-range overpressure from mortar fire is a documented blast mechanism distinct from single-event trauma.
Records and clinical evidence: Documentation of repeated blast exposure, symptom onset, and current neurological findings evaluated under the DC 8045 facets.
Occupational history alone does not establish this diagnosis or its medical relationship to service.
Lumbar spine +
Lumbar strain, degenerative disc disease
Why the occupation may matter: Carrying mortar tube and baseplate components places cumulative load on the lower back beyond standard infantry carriage.
Records and clinical evidence: Current imaging or range-of-motion findings, in-service profile or sick-call records, and an opinion addressing cumulative load.
Occupational history alone does not establish this diagnosis or its medical relationship to service.
Shoulders +
Rotator cuff pathology
Why the occupation may matter: Repeated lifting and carrying of heavy baseplate and tube components stresses the shoulder girdle.
Records and clinical evidence: Current diagnosis, documented in-service onset, and an opinion linking repetitive heavy lifting to the condition.
Occupational history alone does not establish this diagnosis or its medical relationship to service.
Knees +
Degenerative arthritis, meniscal pathology
Why the occupation may matter: Repeated emplacement and displacement under load stresses the knees in a manner similar to, and often exceeding, standard infantry movement.
Records and clinical evidence: Current diagnosis with measured range of motion and documentation of in-service onset or continuity.
Occupational history alone does not establish this diagnosis or its medical relationship to service.
Mental health +
PTSD, depressive and anxiety disorders
Why the occupation may matter: Combat-support fire missions during deployment may involve stressor exposure, depending on assignment.
Records and clinical evidence: A DSM-5 diagnosis, a described stressor, and treatment records showing occupational and social impairment.
Occupational history alone does not establish this diagnosis or its medical relationship to service.
Respiratory +
PACT Act presumptive respiratory conditions
Why the occupation may matter: Relevant only where deployment location and dates fall within a covered exposure period.
Records and clinical evidence: Deployment documentation, current pulmonary testing, and a diagnosis on the presumptive list.
Occupational history alone does not establish this diagnosis or its medical relationship to service.
06 / Exposure record
ILER and toxic exposure
For applicable exposure-related claims, VA may review the Individual Longitudinal Exposure Record (ILER) and a toxic exposure risk activity (TERA) memorandum along with deployment and occupational records. An ILER entry does not automatically establish exposure or service connection.
07 / After a decision
Why a 11C claim may still be denied
An exposure finding is not the same as a grant. These are examples from the researched guide, not predictions about a particular case.
VA may accept
A duty or event consistent with the service record
But may deny
A diagnosis, medical relationship, or rating element
Record to examine
Decision findings, service and private treatment records, examination rationale, and medical opinions.
Blast exposure conceded, TBI or headache claim denied for lack of nexus
VA may accept repeated mortar-blast exposure as an in-service event and still deny the claim because the examiner's opinion does not connect that exposure to a current diagnosis, particularly for headache disorders that developed years later.
Normal separation audiogram used to deny hearing loss
Reliance on a normal separation audiogram alone does not defeat a claim; the Court has held that hearing loss can develop or worsen after separation. Denials focused solely on this point warrant a closer look at the rationale.
No current diagnosis of the claimed joint condition
Complaints of pain without a documented diagnosis, or without functional impairment under Saunders v. Wilkie, are commonly denied at the current-disability step.
Duty position not distinguished from general infantry
Examiners sometimes treat 11C service as generic infantry duty without accounting for the closer, repeated blast exposure specific to gunner and assistant gunner positions, weakening the exposure characterization.
Chronicity gap between separation and first treatment
A long gap before first treatment for hearing loss, back pain, or headaches invites a denial reasoning that the condition arose independently of service; lay statements and early treatment records address this.
Rating understates functional loss
Service connection is granted but the rating rests on a single range-of-motion measurement that does not account for flare-ups or repetitive-use loss, contrary to 38 CFR §§ 4.40, 4.45.
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11C questions
Does being an 11C automatically qualify me for TBI or hearing loss benefits?
No. It supports the in-service exposure element — being at close range to repeated mortar blast and noise. A grant still requires a current diagnosis and a medical opinion connecting that diagnosis to the documented exposure.
Is mortar blast treated differently than rifle noise?
For rating purposes, both hearing loss and tinnitus use the same disability criteria. But for TBI and headache claims, repeated close-range overpressure from mortar fire is a distinct mechanism worth describing specifically rather than folding into general 'infantry noise' language.
I was an ammo bearer, not a gunner — does that matter?
It can. Gunners and assistant gunners typically work closest to the muzzle. An ammo bearer's exposure profile may differ, so describing your specific duty position and how close you worked to the tube during fire missions strengthens the record.
What if my personnel records don't specifically say '11C mortars'?
Your ERB/ORB, NCOERs, and unit training schedules can describe mortar-section duty even if the MOS code alone doesn't capture the specifics. Training records showing fire-mission participation help fill that gap.
Can I claim a back or shoulder condition from carrying the baseplate?
You can file a claim; whether it is granted depends on a current diagnosis and a medical opinion linking it to the documented carriage of tube, baseplate, and ammunition, not on the MOS title alone.
Does deployment change what I can claim?
It can add exposures — burn pits, combat stressors, additional blast events — that depend entirely on where and when you deployed, documented through orders and the DD-214, not the MOS.
Sources and legal references
General education only; not legal or medical advice. Oakridge Claims is a private business, not affiliated with or endorsed by VA. Nothing here establishes a representative-client relationship or guarantees a result. Free accredited VSO help is available.