Marine Corps · MOS history

0312 Riverine Assault Craft (RAC) Marine (FMOS)

The FY19 MOS Manual deleted MOS 0312, Riverine Assault Craft (RAC) Marine (FMOS), as indicated by remark 3. No successor specialty is identified.

Documented history

Riverine Assault Craft (RAC) Marine (FMOS)

1 October 2018 was the scheduled active-duty-component batch date for changes in the Marine Corps Total Force System (MCTFS), not a universal individual qualification or retraining date.

  • Reserve retraining for PSMRP, Active Reserve and SMCR was to be coordinated as required for MOS conversion, subject to available funds.
  • Individual Mobilization Augmentees, Individual Ready Reservists and Standby Reservists required appropriate service record book entries using the headquarters conversion action as authority.
  • Formal schools were to continue awarding current MOSs until a MARADMIN directed implementation of the new conversions.
Source extraction notes

Figure 4-1 remarks: 3. Paragraph 4001.1b schedules the active duty component MCTFS batch for 1 October 2018. Paragraph 4001.6 separately covers Reserve retraining, subject to available funds for the specified retraining groups, and record updates for Individual Mobilization Augmentees, Individual Ready Reservists and Standby Reservists. Under paragraph 4002.3, formal schools keep awarding current MOSs until a MARADMIN directs implementation. The batch date is not a documented universal individual qualification or retraining date.

Source documents (1)

Reviewed September 24, 2026 against references 1, 3 and 4.

Riverine Assault Craft Crewman

MOS 0312 was renamed from Riverine Assault Craft Crewman to Riverine Assault Craft Marine. The specialty retained the same code.

The recorded date for the title change is 24 June 2016. MARADMIN 342/16 was published on 30 June 2016, a separate date.

Source extraction notes

Same-code title change to: Riverine Assault Craft Marine.

Source documents (1)

Reviewed September 24, 2026 against references 1 and 2.

Historical information is drawn from the sources linked above. Classification dates are not personal service dates. Spot an error? Let us know.